20685380

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{11621}}^1$

素因数の和:11719

約数の個数: 24

約数和(自身を含む): 43931160

約数和(自身を除く): 23245780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 11621, 23242, 46484, 58105, 116210, 232420, 1034269, 2068538, 4137076, 5171345, 10342690, 20685380]

約数ペア:

[(1, 20685380), (2, 10342690), (4, 5171345), (5, 4137076), (10, 2068538), (20, 1034269), (89, 232420), (178, 116210), (356, 58105), (445, 46484), (890, 23242), (1780, 11621)]