21161871

素因数分解:

$3^3\times {\mathrm{31}}^1\times {\mathrm{131}}^1\times {\mathrm{193}}^1$

素因数の和:364

約数の個数: 32

約数和(自身を含む): 32778240

約数和(自身を除く): 11616369

約数列:

[1, 3, 9, 27, 31, 93, 131, 193, 279, 393, 579, 837, 1179, 1737, 3537, 4061, 5211, 5983, 12183, 17949, 25283, 36549, 53847, 75849, 109647, 161541, 227547, 682641, 783773, 2351319, 7053957, 21161871]

約数ペア:

[(1, 21161871), (3, 7053957), (9, 2351319), (27, 783773), (31, 682641), (93, 227547), (131, 161541), (193, 109647), (279, 75849), (393, 53847), (579, 36549), (837, 25283), (1179, 17949), (1737, 12183), (3537, 5983), (4061, 5211)]