21388101

素因数分解:

$3^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{24841}}^1$

素因数の和:24892

約数の個数: 16

約数和(自身を含む): 33387648

約数和(自身を除く): 11999547

約数列:

[1, 3, 7, 21, 41, 123, 287, 861, 24841, 74523, 173887, 521661, 1018481, 3055443, 7129367, 21388101]

約数ペア:

[(1, 21388101), (3, 7129367), (7, 3055443), (21, 1018481), (41, 521661), (123, 173887), (287, 74523), (861, 24841)]