20818655

素因数分解:

$5^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{2647}}^1$

素因数の和:2687

約数の個数: 24

約数和(自身を含む): 29583456

約数和(自身を除く): 8764801

約数列:

[1, 5, 11, 13, 55, 65, 121, 143, 605, 715, 1573, 2647, 7865, 13235, 29117, 34411, 145585, 172055, 320287, 378521, 1601435, 1892605, 4163731, 20818655]

約数ペア:

[(1, 20818655), (5, 4163731), (11, 1892605), (13, 1601435), (55, 378521), (65, 320287), (121, 172055), (143, 145585), (605, 34411), (715, 29117), (1573, 13235), (2647, 7865)]