20428800

素因数分解:

$2^{11}\times 3^1\times 5^2\times 7^1\times {\mathrm{19}}^1$

素因数の和:61

約数の個数: 288

約数和(自身を含む): 81244800

約数和(自身を除く): 60816000

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 19, 20, 21, 24, 25, 28, 30, 32, 35, 38, 40, 42, 48, 50, 56, 57, 60, 64, 70, 75, 76, 80, 84, 95, 96, 100, 105, 112, 114, 120, 128, 133, 140, 150, 152, 160, 168, 175, 190, 192, 200, 210, 224, 228, 240, 256, 266, 280, 285, 300, 304, 320, 336, 350, 380, 384, 399, 400, 420, 448, 456, 475, 480, 512, 525, 532, 560, 570, 600, 608, 640, 665, 672, 700, 760, 768, 798, 800, 840, 896, 912, 950, 960, 1024, 1050, 1064, 1120, 1140, 1200, 1216, 1280, 1330, 1344, 1400, 1425, 1520, 1536, 1596, 1600, 1680, 1792, 1824, 1900, 1920, 1995, 2048, 2100, 2128, 2240, 2280, 2400, 2432, 2560, 2660, 2688, 2800, 2850, 3040, 3072, 3192, 3200, 3325, 3360, 3584, 3648, 3800, 3840, 3990, 4200, 4256, 4480, 4560, 4800, 4864, 5120, 5320, 5376, 5600, 5700, 6080, 6144, 6384, 6400, 6650, 6720, 7168, 7296, 7600, 7680, 7980, 8400, 8512, 8960, 9120, 9600, 9728, 9975, 10240, 10640, 10752, 11200, 11400, 12160, 12768, 12800, 13300, 13440, 14336, 14592, 15200, 15360, 15960, 16800, 17024, 17920, 18240, 19200, 19456, 19950, 21280, 21504, 22400, 22800, 24320, 25536, 25600, 26600, 26880, 29184, 30400, 30720, 31920, 33600, 34048, 35840, 36480, 38400, 38912, 39900, 42560, 43008, 44800, 45600, 48640, 51072, 51200, 53200, 53760, 58368, 60800, 63840, 67200, 68096, 71680, 72960, 76800, 79800, 85120, 89600, 91200, 97280, 102144, 106400, 107520, 116736, 121600, 127680, 134400, 136192, 145920, 153600, 159600, 170240, 179200, 182400, 194560, 204288, 212800, 215040, 243200, 255360, 268800, 272384, 291840, 319200, 340480, 358400, 364800, 408576, 425600, 486400, 510720, 537600, 583680, 638400, 680960, 729600, 817152, 851200, 972800, 1021440, 1075200, 1276800, 1361920, 1459200, 1702400, 2042880, 2553600, 2918400, 3404800, 4085760, 5107200, 6809600, 10214400, 20428800]

約数ペア:

[(1, 20428800), (2, 10214400), (3, 6809600), (4, 5107200), (5, 4085760), (6, 3404800), (7, 2918400), (8, 2553600), (10, 2042880), (12, 1702400), (14, 1459200), (15, 1361920), (16, 1276800), (19, 1075200), (20, 1021440), (21, 972800), (24, 851200), (25, 817152), (28, 729600), (30, 680960), (32, 638400), (35, 583680), (38, 537600), (40, 510720), (42, 486400), (48, 425600), (50, 408576), (56, 364800), (57, 358400), (60, 340480), (64, 319200), (70, 291840), (75, 272384), (76, 268800), (80, 255360), (84, 243200), (95, 215040), (96, 212800), (100, 204288), (105, 194560), (112, 182400), (114, 179200), (120, 170240), (128, 159600), (133, 153600), (140, 145920), (150, 136192), (152, 134400), (160, 127680), (168, 121600), (175, 116736), (190, 107520), (192, 106400), (200, 102144), (210, 97280), (224, 91200), (228, 89600), (240, 85120), (256, 79800), (266, 76800), (280, 72960), (285, 71680), (300, 68096), (304, 67200), (320, 63840), (336, 60800), (350, 58368), (380, 53760), (384, 53200), (399, 51200), (400, 51072), (420, 48640), (448, 45600), (456, 44800), (475, 43008), (480, 42560), (512, 39900), (525, 38912), (532, 38400), (560, 36480), (570, 35840), (600, 34048), (608, 33600), (640, 31920), (665, 30720), (672, 30400), (700, 29184), (760, 26880), (768, 26600), (798, 25600), (800, 25536), (840, 24320), (896, 22800), (912, 22400), (950, 21504), (960, 21280), (1024, 19950), (1050, 19456), (1064, 19200), (1120, 18240), (1140, 17920), (1200, 17024), (1216, 16800), (1280, 15960), (1330, 15360), (1344, 15200), (1400, 14592), (1425, 14336), (1520, 13440), (1536, 13300), (1596, 12800), (1600, 12768), (1680, 12160), (1792, 11400), (1824, 11200), (1900, 10752), (1920, 10640), (1995, 10240), (2048, 9975), (2100, 9728), (2128, 9600), (2240, 9120), (2280, 8960), (2400, 8512), (2432, 8400), (2560, 7980), (2660, 7680), (2688, 7600), (2800, 7296), (2850, 7168), (3040, 6720), (3072, 6650), (3192, 6400), (3200, 6384), (3325, 6144), (3360, 6080), (3584, 5700), (3648, 5600), (3800, 5376), (3840, 5320), (3990, 5120), (4200, 4864), (4256, 4800), (4480, 4560)]