81379960

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{65629}}^1$

素因数の和:65671

約数の個数: 32

約数和(自身を含む): 189014400

約数和(自身を除く): 107634440

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 65629, 131258, 262516, 328145, 525032, 656290, 1312580, 2034499, 2625160, 4068998, 8137996, 10172495, 16275992, 20344990, 40689980, 81379960]

約数ペア:

[(1, 81379960), (2, 40689980), (4, 20344990), (5, 16275992), (8, 10172495), (10, 8137996), (20, 4068998), (31, 2625160), (40, 2034499), (62, 1312580), (124, 656290), (155, 525032), (248, 328145), (310, 262516), (620, 131258), (1240, 65629)]