21639961

素因数分解:

$7^1\times {\mathrm{59}}^1\times {\mathrm{151}}^1\times {\mathrm{347}}^1$

素因数の和:564

約数の個数: 16

約数和(自身を含む): 25390080

約数和(自身を除く): 3750119

約数列:

[1, 7, 59, 151, 347, 413, 1057, 2429, 8909, 20473, 52397, 62363, 143311, 366779, 3091423, 21639961]

約数ペア:

[(1, 21639961), (7, 3091423), (59, 366779), (151, 143311), (347, 62363), (413, 52397), (1057, 20473), (2429, 8909)]