857871721

素因数分解:

$7^1\times {\mathrm{139}}^2\times {\mathrm{6343}}^1$

素因数の和:6628

約数の個数: 12

約数和(自身を含む): 987684672

約数和(自身を除く): 129812951

約数列:

[1, 7, 139, 973, 6343, 19321, 44401, 135247, 881677, 6171739, 122553103, 857871721]

約数ペア:

[(1, 857871721), (7, 122553103), (139, 6171739), (973, 881677), (6343, 135247), (19321, 44401)]