21650391

素因数分解:

$3^2\times 7^1\times {\mathrm{401}}^1\times {\mathrm{857}}^1$

素因数の和:1271

約数の個数: 24

約数和(自身を含む): 35871264

約数和(自身を除く): 14220873

約数列:

[1, 3, 7, 9, 21, 63, 401, 857, 1203, 2571, 2807, 3609, 5999, 7713, 8421, 17997, 25263, 53991, 343657, 1030971, 2405599, 3092913, 7216797, 21650391]

約数ペア:

[(1, 21650391), (3, 7216797), (7, 3092913), (9, 2405599), (21, 1030971), (63, 343657), (401, 53991), (857, 25263), (1203, 17997), (2571, 8421), (2807, 7713), (3609, 5999)]