21007745

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{13171}}^1$

素因数の和:13216

約数の個数: 16

約数和(自身を含む): 28451520

約数和(自身を除く): 7443775

約数列:

[1, 5, 11, 29, 55, 145, 319, 1595, 13171, 65855, 144881, 381959, 724405, 1909795, 4201549, 21007745]

約数ペア:

[(1, 21007745), (5, 4201549), (11, 1909795), (29, 724405), (55, 381959), (145, 144881), (319, 65855), (1595, 13171)]