21074315

素因数分解:

$5^1\times {\mathrm{103}}^1\times {\mathrm{151}}^1\times {\mathrm{271}}^1$

素因数の和:530

約数の個数: 16

約数和(自身を含む): 25798656

約数和(自身を除く): 4724341

約数列:

[1, 5, 103, 151, 271, 515, 755, 1355, 15553, 27913, 40921, 77765, 139565, 204605, 4214863, 21074315]

約数ペア:

[(1, 21074315), (5, 4214863), (103, 204605), (151, 139565), (271, 77765), (515, 40921), (755, 27913), (1355, 15553)]