21816879

素因数分解:

$3^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{25339}}^1$

素因数の和:25390

約数の個数: 16

約数和(自身を含む): 34056960

約数和(自身を除く): 12240081

約数列:

[1, 3, 7, 21, 41, 123, 287, 861, 25339, 76017, 177373, 532119, 1038899, 3116697, 7272293, 21816879]

約数ペア:

[(1, 21816879), (3, 7272293), (7, 3116697), (21, 1038899), (41, 532119), (123, 177373), (287, 76017), (861, 25339)]