21684075

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{103}}^1\times {\mathrm{401}}^1$

素因数の和:524

約数の個数: 48

約数和(自身を含む): 41473536

約数和(自身を除く): 19789461

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 75, 103, 105, 175, 309, 401, 515, 525, 721, 1203, 1545, 2005, 2163, 2575, 2807, 3605, 6015, 7725, 8421, 10025, 10815, 14035, 18025, 30075, 41303, 42105, 54075, 70175, 123909, 206515, 210525, 289121, 619545, 867363, 1032575, 1445605, 3097725, 4336815, 7228025, 21684075]

約数ペア:

[(1, 21684075), (3, 7228025), (5, 4336815), (7, 3097725), (15, 1445605), (21, 1032575), (25, 867363), (35, 619545), (75, 289121), (103, 210525), (105, 206515), (175, 123909), (309, 70175), (401, 54075), (515, 42105), (525, 41303), (721, 30075), (1203, 18025), (1545, 14035), (2005, 10815), (2163, 10025), (2575, 8421), (2807, 7725), (3605, 6015)]