81385540

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{131267}}^1$

素因数の和:131307

約数の個数: 24

約数和(自身を含む): 176424192

約数和(自身を除く): 95038652

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 131267, 262534, 525068, 656335, 1312670, 2625340, 4069277, 8138554, 16277108, 20346385, 40692770, 81385540]

約数ペア:

[(1, 81385540), (2, 40692770), (4, 20346385), (5, 16277108), (10, 8138554), (20, 4069277), (31, 2625340), (62, 1312670), (124, 656335), (155, 525068), (310, 262534), (620, 131267)]