81319850

素因数分解:

$2^1\times 5^2\times {\mathrm{71}}^1\times {\mathrm{22907}}^1$

素因数の和:22990

約数の個数: 24

約数和(自身を含む): 153391968

約数和(自身を除く): 72072118

約数列:

[1, 2, 5, 10, 25, 50, 71, 142, 355, 710, 1775, 3550, 22907, 45814, 114535, 229070, 572675, 1145350, 1626397, 3252794, 8131985, 16263970, 40659925, 81319850]

約数ペア:

[(1, 81319850), (2, 40659925), (5, 16263970), (10, 8131985), (25, 3252794), (50, 1626397), (71, 1145350), (142, 572675), (355, 229070), (710, 114535), (1775, 45814), (3550, 22907)]