21315917

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{3079}}^1$

素因数の和:3152

約数の個数: 16

約数和(自身を含む): 26019840

約数和(自身を除く): 4703923

約数列:

[1, 7, 23, 43, 161, 301, 989, 3079, 6923, 21553, 70817, 132397, 495719, 926779, 3045131, 21315917]

約数ペア:

[(1, 21315917), (7, 3045131), (23, 926779), (43, 495719), (161, 132397), (301, 70817), (989, 21553), (3079, 6923)]