21220760

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{2837}}^1$

素因数の和:2876

約数の個数: 64

約数和(自身を含む): 55170720

約数和(自身を除く): 33949960

約数列:

[1, 2, 4, 5, 8, 10, 11, 17, 20, 22, 34, 40, 44, 55, 68, 85, 88, 110, 136, 170, 187, 220, 340, 374, 440, 680, 748, 935, 1496, 1870, 2837, 3740, 5674, 7480, 11348, 14185, 22696, 28370, 31207, 48229, 56740, 62414, 96458, 113480, 124828, 156035, 192916, 241145, 249656, 312070, 385832, 482290, 530519, 624140, 964580, 1061038, 1248280, 1929160, 2122076, 2652595, 4244152, 5305190, 10610380, 21220760]

約数ペア:

[(1, 21220760), (2, 10610380), (4, 5305190), (5, 4244152), (8, 2652595), (10, 2122076), (11, 1929160), (17, 1248280), (20, 1061038), (22, 964580), (34, 624140), (40, 530519), (44, 482290), (55, 385832), (68, 312070), (85, 249656), (88, 241145), (110, 192916), (136, 156035), (170, 124828), (187, 113480), (220, 96458), (340, 62414), (374, 56740), (440, 48229), (680, 31207), (748, 28370), (935, 22696), (1496, 14185), (1870, 11348), (2837, 7480), (3740, 5674)]