21117887

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{4523}}^1$

素因数の和:4582

約数の個数: 16

約数和(自身を含む): 26058240

約数和(自身を除く): 4940353

約数列:

[1, 7, 23, 29, 161, 203, 667, 4523, 4669, 31661, 104029, 131167, 728203, 918169, 3016841, 21117887]

約数ペア:

[(1, 21117887), (7, 3016841), (23, 918169), (29, 728203), (161, 131167), (203, 104029), (667, 31661), (4523, 4669)]