20215643

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{307}}^1\times {\mathrm{409}}^1$

素因数の和:746

約数の個数: 16

約数和(自身を含む): 24245760

約数和(自身を除く): 4030117

約数列:

[1, 7, 23, 161, 307, 409, 2149, 2863, 7061, 9407, 49427, 65849, 125563, 878941, 2887949, 20215643]

約数ペア:

[(1, 20215643), (7, 2887949), (23, 878941), (161, 125563), (307, 65849), (409, 49427), (2149, 9407), (2863, 7061)]