21071540

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{3671}}^1$

素因数の和:3728

約数の個数: 48

約数和(自身を含む): 51819264

約数和(自身を除く): 30747724

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 41, 70, 82, 140, 164, 205, 287, 410, 574, 820, 1148, 1435, 2870, 3671, 5740, 7342, 14684, 18355, 25697, 36710, 51394, 73420, 102788, 128485, 150511, 256970, 301022, 513940, 602044, 752555, 1053577, 1505110, 2107154, 3010220, 4214308, 5267885, 10535770, 21071540]

約数ペア:

[(1, 21071540), (2, 10535770), (4, 5267885), (5, 4214308), (7, 3010220), (10, 2107154), (14, 1505110), (20, 1053577), (28, 752555), (35, 602044), (41, 513940), (70, 301022), (82, 256970), (140, 150511), (164, 128485), (205, 102788), (287, 73420), (410, 51394), (574, 36710), (820, 25697), (1148, 18355), (1435, 14684), (2870, 7342), (3671, 5740)]