21290960

素因数分解:

$2^4\times 5^1\times {\mathrm{266137}}^1$

素因数の和:266150

約数の個数: 20

約数和(自身を含む): 49501668

約数和(自身を除く): 28210708

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 266137, 532274, 1064548, 1330685, 2129096, 2661370, 4258192, 5322740, 10645480, 21290960]

約数ペア:

[(1, 21290960), (2, 10645480), (4, 5322740), (5, 4258192), (8, 2661370), (10, 2129096), (16, 1330685), (20, 1064548), (40, 532274), (80, 266137)]