20643840

素因数分解:

$2^{16}\times 3^2\times 5^1\times 7^1$

素因数の和:50

約数の個数: 204

約数和(自身を含む): 81788304

約数和(自身を除く): 61144464

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 28, 30, 32, 35, 36, 40, 42, 45, 48, 56, 60, 63, 64, 70, 72, 80, 84, 90, 96, 105, 112, 120, 126, 128, 140, 144, 160, 168, 180, 192, 210, 224, 240, 252, 256, 280, 288, 315, 320, 336, 360, 384, 420, 448, 480, 504, 512, 560, 576, 630, 640, 672, 720, 768, 840, 896, 960, 1008, 1024, 1120, 1152, 1260, 1280, 1344, 1440, 1536, 1680, 1792, 1920, 2016, 2048, 2240, 2304, 2520, 2560, 2688, 2880, 3072, 3360, 3584, 3840, 4032, 4096, 4480, 4608, 5040, 5120, 5376, 5760, 6144, 6720, 7168, 7680, 8064, 8192, 8960, 9216, 10080, 10240, 10752, 11520, 12288, 13440, 14336, 15360, 16128, 16384, 17920, 18432, 20160, 20480, 21504, 23040, 24576, 26880, 28672, 30720, 32256, 32768, 35840, 36864, 40320, 40960, 43008, 46080, 49152, 53760, 57344, 61440, 64512, 65536, 71680, 73728, 80640, 81920, 86016, 92160, 98304, 107520, 114688, 122880, 129024, 143360, 147456, 161280, 163840, 172032, 184320, 196608, 215040, 229376, 245760, 258048, 286720, 294912, 322560, 327680, 344064, 368640, 430080, 458752, 491520, 516096, 573440, 589824, 645120, 688128, 737280, 860160, 983040, 1032192, 1146880, 1290240, 1376256, 1474560, 1720320, 2064384, 2293760, 2580480, 2949120, 3440640, 4128768, 5160960, 6881280, 10321920, 20643840]

約数ペア:

[(1, 20643840), (2, 10321920), (3, 6881280), (4, 5160960), (5, 4128768), (6, 3440640), (7, 2949120), (8, 2580480), (9, 2293760), (10, 2064384), (12, 1720320), (14, 1474560), (15, 1376256), (16, 1290240), (18, 1146880), (20, 1032192), (21, 983040), (24, 860160), (28, 737280), (30, 688128), (32, 645120), (35, 589824), (36, 573440), (40, 516096), (42, 491520), (45, 458752), (48, 430080), (56, 368640), (60, 344064), (63, 327680), (64, 322560), (70, 294912), (72, 286720), (80, 258048), (84, 245760), (90, 229376), (96, 215040), (105, 196608), (112, 184320), (120, 172032), (126, 163840), (128, 161280), (140, 147456), (144, 143360), (160, 129024), (168, 122880), (180, 114688), (192, 107520), (210, 98304), (224, 92160), (240, 86016), (252, 81920), (256, 80640), (280, 73728), (288, 71680), (315, 65536), (320, 64512), (336, 61440), (360, 57344), (384, 53760), (420, 49152), (448, 46080), (480, 43008), (504, 40960), (512, 40320), (560, 36864), (576, 35840), (630, 32768), (640, 32256), (672, 30720), (720, 28672), (768, 26880), (840, 24576), (896, 23040), (960, 21504), (1008, 20480), (1024, 20160), (1120, 18432), (1152, 17920), (1260, 16384), (1280, 16128), (1344, 15360), (1440, 14336), (1536, 13440), (1680, 12288), (1792, 11520), (1920, 10752), (2016, 10240), (2048, 10080), (2240, 9216), (2304, 8960), (2520, 8192), (2560, 8064), (2688, 7680), (2880, 7168), (3072, 6720), (3360, 6144), (3584, 5760), (3840, 5376), (4032, 5120), (4096, 5040), (4480, 4608)]