20794320640

素因数分解:

$2^8\times 5^1\times {\mathrm{2381}}^1\times {\mathrm{6823}}^1$

素因数の和:9225

約数の個数: 72

約数和(自身を含む): 49837118688

約数和(自身を除く): 29042798048

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 1280, 2381, 4762, 6823, 9524, 11905, 13646, 19048, 23810, 27292, 34115, 38096, 47620, 54584, 68230, 76192, 95240, 109168, 136460, 152384, 190480, 218336, 272920, 304768, 380960, 436672, 545840, 609536, 761920, 873344, 1091680, 1523840, 1746688, 2183360, 3047680, 4366720, 8733440, 16245563, 32491126, 64982252, 81227815, 129964504, 162455630, 259929008, 324911260, 519858016, 649822520, 1039716032, 1299645040, 2079432064, 2599290080, 4158864128, 5198580160, 10397160320, 20794320640]

約数ペア:

[(1, 20794320640), (2, 10397160320), (4, 5198580160), (5, 4158864128), (8, 2599290080), (10, 2079432064), (16, 1299645040), (20, 1039716032), (32, 649822520), (40, 519858016), (64, 324911260), (80, 259929008), (128, 162455630), (160, 129964504), (256, 81227815), (320, 64982252), (640, 32491126), (1280, 16245563), (2381, 8733440), (4762, 4366720), (6823, 3047680), (9524, 2183360), (11905, 1746688), (13646, 1523840), (19048, 1091680), (23810, 873344), (27292, 761920), (34115, 609536), (38096, 545840), (47620, 436672), (54584, 380960), (68230, 304768), (76192, 272920), (95240, 218336), (109168, 190480), (136460, 152384)]