21297735880

素因数分解:

$2^3\times 5^1\times {\mathrm{811}}^1\times {\mathrm{656527}}^1$

素因数の和:657349

約数の個数: 32

約数和(自身を含む): 47979066240

約数和(自身を除く): 26681330360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 811, 1622, 3244, 4055, 6488, 8110, 16220, 32440, 656527, 1313054, 2626108, 3282635, 5252216, 6565270, 13130540, 26261080, 532443397, 1064886794, 2129773588, 2662216985, 4259547176, 5324433970, 10648867940, 21297735880]

約数ペア:

[(1, 21297735880), (2, 10648867940), (4, 5324433970), (5, 4259547176), (8, 2662216985), (10, 2129773588), (20, 1064886794), (40, 532443397), (811, 26261080), (1622, 13130540), (3244, 6565270), (4055, 5252216), (6488, 3282635), (8110, 2626108), (16220, 1313054), (32440, 656527)]