19721020

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{5273}}^1$

素因数の和:5310

約数の個数: 48

約数和(自身を含む): 47845728

約数和(自身を除く): 28124708

約数列:

[1, 2, 4, 5, 10, 11, 17, 20, 22, 34, 44, 55, 68, 85, 110, 170, 187, 220, 340, 374, 748, 935, 1870, 3740, 5273, 10546, 21092, 26365, 52730, 58003, 89641, 105460, 116006, 179282, 232012, 290015, 358564, 448205, 580030, 896410, 986051, 1160060, 1792820, 1972102, 3944204, 4930255, 9860510, 19721020]

約数ペア:

[(1, 19721020), (2, 9860510), (4, 4930255), (5, 3944204), (10, 1972102), (11, 1792820), (17, 1160060), (20, 986051), (22, 896410), (34, 580030), (44, 448205), (55, 358564), (68, 290015), (85, 232012), (110, 179282), (170, 116006), (187, 105460), (220, 89641), (340, 58003), (374, 52730), (748, 26365), (935, 21092), (1870, 10546), (3740, 5273)]