159781520

素因数分解:

$2^4\times 5^1\times {\mathrm{1997269}}^1$

素因数の和:1997282

約数の個数: 20

約数和(自身を含む): 371492220

約数和(自身を除く): 211710700

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1997269, 3994538, 7989076, 9986345, 15978152, 19972690, 31956304, 39945380, 79890760, 159781520]

約数ペア:

[(1, 159781520), (2, 79890760), (4, 39945380), (5, 31956304), (8, 19972690), (10, 15978152), (16, 9986345), (20, 7989076), (40, 3994538), (80, 1997269)]