21540480

素因数分解:

$2^7\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{863}}^1$

素因数の和:898

約数の個数: 128

約数和(自身を含む): 74027520

約数和(自身を除く): 52487040

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 16, 20, 24, 26, 30, 32, 39, 40, 48, 52, 60, 64, 65, 78, 80, 96, 104, 120, 128, 130, 156, 160, 192, 195, 208, 240, 260, 312, 320, 384, 390, 416, 480, 520, 624, 640, 780, 832, 863, 960, 1040, 1248, 1560, 1664, 1726, 1920, 2080, 2496, 2589, 3120, 3452, 4160, 4315, 4992, 5178, 6240, 6904, 8320, 8630, 10356, 11219, 12480, 12945, 13808, 17260, 20712, 22438, 24960, 25890, 27616, 33657, 34520, 41424, 44876, 51780, 55232, 56095, 67314, 69040, 82848, 89752, 103560, 110464, 112190, 134628, 138080, 165696, 168285, 179504, 207120, 224380, 269256, 276160, 331392, 336570, 359008, 414240, 448760, 538512, 552320, 673140, 718016, 828480, 897520, 1077024, 1346280, 1436032, 1656960, 1795040, 2154048, 2692560, 3590080, 4308096, 5385120, 7180160, 10770240, 21540480]

約数ペア:

[(1, 21540480), (2, 10770240), (3, 7180160), (4, 5385120), (5, 4308096), (6, 3590080), (8, 2692560), (10, 2154048), (12, 1795040), (13, 1656960), (15, 1436032), (16, 1346280), (20, 1077024), (24, 897520), (26, 828480), (30, 718016), (32, 673140), (39, 552320), (40, 538512), (48, 448760), (52, 414240), (60, 359008), (64, 336570), (65, 331392), (78, 276160), (80, 269256), (96, 224380), (104, 207120), (120, 179504), (128, 168285), (130, 165696), (156, 138080), (160, 134628), (192, 112190), (195, 110464), (208, 103560), (240, 89752), (260, 82848), (312, 69040), (320, 67314), (384, 56095), (390, 55232), (416, 51780), (480, 44876), (520, 41424), (624, 34520), (640, 33657), (780, 27616), (832, 25890), (863, 24960), (960, 22438), (1040, 20712), (1248, 17260), (1560, 13808), (1664, 12945), (1726, 12480), (1920, 11219), (2080, 10356), (2496, 8630), (2589, 8320), (3120, 6904), (3452, 6240), (4160, 5178), (4315, 4992)]