21687185

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{3061}}^1$

素因数の和:3188

約数の個数: 16

約数和(自身を含む): 28292880

約数和(自身を除く): 6605695

約数列:

[1, 5, 13, 65, 109, 545, 1417, 3061, 7085, 15305, 39793, 198965, 333649, 1668245, 4337437, 21687185]

約数ペア:

[(1, 21687185), (5, 4337437), (13, 1668245), (65, 333649), (109, 198965), (545, 39793), (1417, 15305), (3061, 7085)]