18688509

素因数分解:

$3^3\times 7^1\times {\mathrm{61}}^1\times {\mathrm{1621}}^1$

素因数の和:1698

約数の個数: 32

約数和(自身を含む): 32180480

約数和(自身を除く): 13491971

約数列:

[1, 3, 7, 9, 21, 27, 61, 63, 183, 189, 427, 549, 1281, 1621, 1647, 3843, 4863, 11347, 11529, 14589, 34041, 43767, 98881, 102123, 296643, 306369, 692167, 889929, 2076501, 2669787, 6229503, 18688509]

約数ペア:

[(1, 18688509), (3, 6229503), (7, 2669787), (9, 2076501), (21, 889929), (27, 692167), (61, 306369), (63, 296643), (183, 102123), (189, 98881), (427, 43767), (549, 34041), (1281, 14589), (1621, 11529), (1647, 11347), (3843, 4863)]