21940715

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{353}}^1\times {\mathrm{401}}^1$

素因数の和:790

約数の個数: 16

約数和(自身を含む): 27323136

約数和(自身を除く): 5382421

約数列:

[1, 5, 31, 155, 353, 401, 1765, 2005, 10943, 12431, 54715, 62155, 141553, 707765, 4388143, 21940715]

約数ペア:

[(1, 21940715), (5, 4388143), (31, 707765), (155, 141553), (353, 62155), (401, 54715), (1765, 12431), (2005, 10943)]