157679991

素因数分解:

$3^2\times 7^2\times {\mathrm{357551}}^1$

素因数の和:357571

約数の個数: 18

約数和(自身を含む): 264946032

約数和(自身を除く): 107266041

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 357551, 1072653, 2502857, 3217959, 7508571, 17519999, 22525713, 52559997, 157679991]

約数ペア:

[(1, 157679991), (3, 52559997), (7, 22525713), (9, 17519999), (21, 7508571), (49, 3217959), (63, 2502857), (147, 1072653), (441, 357551)]