396760940

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{639937}}^1$

素因数の和:639977

約数の個数: 24

約数和(自身を含む): 860076672

約数和(自身を除く): 463315732

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 639937, 1279874, 2559748, 3199685, 6399370, 12798740, 19838047, 39676094, 79352188, 99190235, 198380470, 396760940]

約数ペア:

[(1, 396760940), (2, 198380470), (4, 99190235), (5, 79352188), (10, 39676094), (20, 19838047), (31, 12798740), (62, 6399370), (124, 3199685), (155, 2559748), (310, 1279874), (620, 639937)]