20660255

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{103}}^1\times {\mathrm{521}}^1$

素因数の和:647

約数の個数: 32

約数和(自身を含む): 31269888

約数和(自身を除く): 10609633

約数列:

[1, 5, 7, 11, 35, 55, 77, 103, 385, 515, 521, 721, 1133, 2605, 3605, 3647, 5665, 5731, 7931, 18235, 28655, 39655, 40117, 53663, 200585, 268315, 375641, 590293, 1878205, 2951465, 4132051, 20660255]

約数ペア:

[(1, 20660255), (5, 4132051), (7, 2951465), (11, 1878205), (35, 590293), (55, 375641), (77, 268315), (103, 200585), (385, 53663), (515, 40117), (521, 39655), (721, 28655), (1133, 18235), (2605, 7931), (3605, 5731), (3647, 5665)]