21621920

素因数分解:

$2^5\times 5^1\times {\mathrm{337}}^1\times {\mathrm{401}}^1$

素因数の和:753

約数の個数: 48

約数和(自身を含む): 51361128

約数和(自身を除く): 29739208

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 337, 401, 674, 802, 1348, 1604, 1685, 2005, 2696, 3208, 3370, 4010, 5392, 6416, 6740, 8020, 10784, 12832, 13480, 16040, 26960, 32080, 53920, 64160, 135137, 270274, 540548, 675685, 1081096, 1351370, 2162192, 2702740, 4324384, 5405480, 10810960, 21621920]

約数ペア:

[(1, 21621920), (2, 10810960), (4, 5405480), (5, 4324384), (8, 2702740), (10, 2162192), (16, 1351370), (20, 1081096), (32, 675685), (40, 540548), (80, 270274), (160, 135137), (337, 64160), (401, 53920), (674, 32080), (802, 26960), (1348, 16040), (1604, 13480), (1685, 12832), (2005, 10784), (2696, 8020), (3208, 6740), (3370, 6416), (4010, 5392)]