20511770

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{127}}^1\times {\mathrm{521}}^1$

素因数の和:686

約数の個数: 32

約数和(自身を含む): 38486016

約数和(自身を除く): 17974246

約数列:

[1, 2, 5, 10, 31, 62, 127, 155, 254, 310, 521, 635, 1042, 1270, 2605, 3937, 5210, 7874, 16151, 19685, 32302, 39370, 66167, 80755, 132334, 161510, 330835, 661670, 2051177, 4102354, 10255885, 20511770]

約数ペア:

[(1, 20511770), (2, 10255885), (5, 4102354), (10, 2051177), (31, 661670), (62, 330835), (127, 161510), (155, 132334), (254, 80755), (310, 66167), (521, 39370), (635, 32302), (1042, 19685), (1270, 16151), (2605, 7874), (3937, 5210)]