20688661

素因数分解:

$7^1\times {\mathrm{23}}^2\times {\mathrm{37}}^1\times {\mathrm{151}}^1$

素因数の和:241

約数の個数: 24

約数和(自身を含む): 25553024

約数和(自身を除く): 4864363

約数列:

[1, 7, 23, 37, 151, 161, 259, 529, 851, 1057, 3473, 3703, 5587, 5957, 19573, 24311, 39109, 79879, 128501, 137011, 559153, 899507, 2955523, 20688661]

約数ペア:

[(1, 20688661), (7, 2955523), (23, 899507), (37, 559153), (151, 137011), (161, 128501), (259, 79879), (529, 39109), (851, 24311), (1057, 19573), (3473, 5957), (3703, 5587)]