21256731

素因数分解:

$3^2\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{1249}}^1$

素因数の和:1347

約数の個数: 24

約数和(自身を含む): 32240000

約数和(自身を除く): 10983269

約数列:

[1, 3, 9, 31, 61, 93, 183, 279, 549, 1249, 1891, 3747, 5673, 11241, 17019, 38719, 76189, 116157, 228567, 348471, 685701, 2361859, 7085577, 21256731]

約数ペア:

[(1, 21256731), (3, 7085577), (9, 2361859), (31, 685701), (61, 348471), (93, 228567), (183, 116157), (279, 76189), (549, 38719), (1249, 17019), (1891, 11241), (3747, 5673)]