21408380

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{5273}}^1$

素因数の和:5318

約数の個数: 48

約数和(自身を含む): 53161920

約数和(自身を除く): 31753540

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 29, 35, 58, 70, 116, 140, 145, 203, 290, 406, 580, 812, 1015, 2030, 4060, 5273, 10546, 21092, 26365, 36911, 52730, 73822, 105460, 147644, 152917, 184555, 305834, 369110, 611668, 738220, 764585, 1070419, 1529170, 2140838, 3058340, 4281676, 5352095, 10704190, 21408380]

約数ペア:

[(1, 21408380), (2, 10704190), (4, 5352095), (5, 4281676), (7, 3058340), (10, 2140838), (14, 1529170), (20, 1070419), (28, 764585), (29, 738220), (35, 611668), (58, 369110), (70, 305834), (116, 184555), (140, 152917), (145, 147644), (203, 105460), (290, 73822), (406, 52730), (580, 36911), (812, 26365), (1015, 21092), (2030, 10546), (4060, 5273)]