21298180

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{36721}}^1$

素因数の和:36759

約数の個数: 24

約数和(自身を含む): 46269720

約数和(自身を除く): 24971540

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 116, 145, 290, 580, 36721, 73442, 146884, 183605, 367210, 734420, 1064909, 2129818, 4259636, 5324545, 10649090, 21298180]

約数ペア:

[(1, 21298180), (2, 10649090), (4, 5324545), (5, 4259636), (10, 2129818), (20, 1064909), (29, 734420), (58, 367210), (116, 183605), (145, 146884), (290, 73442), (580, 36721)]