686475140

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{2640289}}^1$

素因数の和:2640311

約数の個数: 24

約数和(自身を含む): 1552490520

約数和(自身を除く): 866015380

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 2640289, 5280578, 10561156, 13201445, 26402890, 34323757, 52805780, 68647514, 137295028, 171618785, 343237570, 686475140]

約数ペア:

[(1, 686475140), (2, 343237570), (4, 171618785), (5, 137295028), (10, 68647514), (13, 52805780), (20, 34323757), (26, 26402890), (52, 13201445), (65, 10561156), (130, 5280578), (260, 2640289)]