79890640

素因数分解:

$2^4\times 5^1\times {\mathrm{998633}}^1$

素因数の和:998646

約数の個数: 20

約数和(自身を含む): 185745924

約数和(自身を除く): 105855284

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 998633, 1997266, 3994532, 4993165, 7989064, 9986330, 15978128, 19972660, 39945320, 79890640]

約数ペア:

[(1, 79890640), (2, 39945320), (4, 19972660), (5, 15978128), (8, 9986330), (10, 7989064), (16, 4993165), (20, 3994532), (40, 1997266), (80, 998633)]