21119540

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{2801}}^1$

素因数の和:2852

約数の個数: 48

約数和(自身を含む): 49427280

約数和(自身を除く): 28307740

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 29, 52, 58, 65, 116, 130, 145, 260, 290, 377, 580, 754, 1508, 1885, 2801, 3770, 5602, 7540, 11204, 14005, 28010, 36413, 56020, 72826, 81229, 145652, 162458, 182065, 324916, 364130, 406145, 728260, 812290, 1055977, 1624580, 2111954, 4223908, 5279885, 10559770, 21119540]

約数ペア:

[(1, 21119540), (2, 10559770), (4, 5279885), (5, 4223908), (10, 2111954), (13, 1624580), (20, 1055977), (26, 812290), (29, 728260), (52, 406145), (58, 364130), (65, 324916), (116, 182065), (130, 162458), (145, 145652), (260, 81229), (290, 72826), (377, 56020), (580, 36413), (754, 28010), (1508, 14005), (1885, 11204), (2801, 7540), (3770, 5602)]