21231385

素因数分解:

$5^1\times 7^1\times {\mathrm{17}}^2\times {\mathrm{2099}}^1$

素因数の和:2145

約数の個数: 24

約数和(自身を含む): 30945600

約数和(自身を除く): 9714215

約数列:

[1, 5, 7, 17, 35, 85, 119, 289, 595, 1445, 2023, 2099, 10115, 10495, 14693, 35683, 73465, 178415, 249781, 606611, 1248905, 3033055, 4246277, 21231385]

約数ペア:

[(1, 21231385), (5, 4246277), (7, 3033055), (17, 1248905), (35, 606611), (85, 249781), (119, 178415), (289, 73465), (595, 35683), (1445, 14693), (2023, 10495), (2099, 10115)]