21175115

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19163}}^1$

素因数の和:19198

約数の個数: 16

約数和(自身を含む): 28975968

約数和(自身を除く): 7800853

約数列:

[1, 5, 13, 17, 65, 85, 221, 1105, 19163, 95815, 249119, 325771, 1245595, 1628855, 4235023, 21175115]

約数ペア:

[(1, 21175115), (5, 4235023), (13, 1628855), (17, 1245595), (65, 325771), (85, 249119), (221, 95815), (1105, 19163)]