21245620

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{269}}^1\times {\mathrm{359}}^1$

素因数の和:648

約数の個数: 48

約数和(自身を含む): 48988800

約数和(自身を除く): 27743180

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 269, 359, 538, 718, 1076, 1345, 1436, 1795, 2690, 2959, 3590, 3949, 5380, 5918, 7180, 7898, 11836, 14795, 15796, 19745, 29590, 39490, 59180, 78980, 96571, 193142, 386284, 482855, 965710, 1062281, 1931420, 2124562, 4249124, 5311405, 10622810, 21245620]

約数ペア:

[(1, 21245620), (2, 10622810), (4, 5311405), (5, 4249124), (10, 2124562), (11, 1931420), (20, 1062281), (22, 965710), (44, 482855), (55, 386284), (110, 193142), (220, 96571), (269, 78980), (359, 59180), (538, 39490), (718, 29590), (1076, 19745), (1345, 15796), (1436, 14795), (1795, 11836), (2690, 7898), (2959, 7180), (3590, 5918), (3949, 5380)]