21678167

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{4643}}^1$

素因数の和:4702

約数の個数: 16

約数和(自身を含む): 26749440

約数和(自身を除く): 5071273

約数列:

[1, 7, 23, 29, 161, 203, 667, 4643, 4669, 32501, 106789, 134647, 747523, 942529, 3096881, 21678167]

約数ペア:

[(1, 21678167), (7, 3096881), (23, 942529), (29, 747523), (161, 134647), (203, 106789), (667, 32501), (4643, 4669)]