28406980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{202907}}^1$

素因数の和:202923

約数の個数: 24

約数和(自身を含む): 68177088

約数和(自身を除く): 39770108

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 202907, 405814, 811628, 1014535, 1420349, 2029070, 2840698, 4058140, 5681396, 7101745, 14203490, 28406980]

約数ペア:

[(1, 28406980), (2, 14203490), (4, 7101745), (5, 5681396), (7, 4058140), (10, 2840698), (14, 2029070), (20, 1420349), (28, 1014535), (35, 811628), (70, 405814), (140, 202907)]