21420845

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{113}}^1\times {\mathrm{1223}}^1$

素因数の和:1372

約数の個数: 16

約数和(自身を含む): 26790912

約数和(自身を除く): 5370067

約数列:

[1, 5, 31, 113, 155, 565, 1223, 3503, 6115, 17515, 37913, 138199, 189565, 690995, 4284169, 21420845]

約数ペア:

[(1, 21420845), (5, 4284169), (31, 690995), (113, 189565), (155, 138199), (565, 37913), (1223, 17515), (3503, 6115)]