21357890

素因数分解:

$2^1\times 5^1\times {\mathrm{163}}^1\times {\mathrm{13103}}^1$

素因数の和:13273

約数の個数: 16

約数和(自身を含む): 38683008

約数和(自身を除く): 17325118

約数列:

[1, 2, 5, 10, 163, 326, 815, 1630, 13103, 26206, 65515, 131030, 2135789, 4271578, 10678945, 21357890]

約数ペア:

[(1, 21357890), (2, 10678945), (5, 4271578), (10, 2135789), (163, 131030), (326, 65515), (815, 26206), (1630, 13103)]