51261680

素因数分解:

$2^4\times 5^1\times {\mathrm{640771}}^1$

素因数の和:640784

約数の個数: 20

約数和(自身を含む): 119183592

約数和(自身を除く): 67921912

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 640771, 1281542, 2563084, 3203855, 5126168, 6407710, 10252336, 12815420, 25630840, 51261680]

約数ペア:

[(1, 51261680), (2, 25630840), (4, 12815420), (5, 10252336), (8, 6407710), (10, 5126168), (16, 3203855), (20, 2563084), (40, 1281542), (80, 640771)]