21155485

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{10499}}^1$

素因数の和:10548

約数の個数: 16

約数和(自身を含む): 28224000

約数和(自身を除く): 7068515

約数列:

[1, 5, 13, 31, 65, 155, 403, 2015, 10499, 52495, 136487, 325469, 682435, 1627345, 4231097, 21155485]

約数ペア:

[(1, 21155485), (5, 4231097), (13, 1627345), (31, 682435), (65, 325469), (155, 136487), (403, 52495), (2015, 10499)]