20957139

素因数分解:

$3^2\times 7^1\times {\mathrm{151}}^1\times {\mathrm{2203}}^1$

素因数の和:2367

約数の個数: 24

約数和(自身を含む): 34840832

約数和(自身を除く): 13883693

約数列:

[1, 3, 7, 9, 21, 63, 151, 453, 1057, 1359, 2203, 3171, 6609, 9513, 15421, 19827, 46263, 138789, 332653, 997959, 2328571, 2993877, 6985713, 20957139]

約数ペア:

[(1, 20957139), (3, 6985713), (7, 2993877), (9, 2328571), (21, 997959), (63, 332653), (151, 138789), (453, 46263), (1057, 19827), (1359, 15421), (2203, 9513), (3171, 6609)]