21920885

素因数分解:

$5^1\times 7^2\times {\mathrm{131}}^1\times {\mathrm{683}}^1$

素因数の和:833

約数の個数: 24

約数和(自身を含む): 30878496

約数和(自身を除く): 8957611

約数列:

[1, 5, 7, 35, 49, 131, 245, 655, 683, 917, 3415, 4585, 4781, 6419, 23905, 32095, 33467, 89473, 167335, 447365, 626311, 3131555, 4384177, 21920885]

約数ペア:

[(1, 21920885), (5, 4384177), (7, 3131555), (35, 626311), (49, 447365), (131, 167335), (245, 89473), (655, 33467), (683, 32095), (917, 23905), (3415, 6419), (4585, 4781)]