28120420

素因数分解:

$2^2\times 5^1\times {\mathrm{101}}^1\times {\mathrm{13921}}^1$

素因数の和:14031

約数の個数: 24

約数和(自身を含む): 59641848

約数和(自身を除く): 31521428

約数列:

[1, 2, 4, 5, 10, 20, 101, 202, 404, 505, 1010, 2020, 13921, 27842, 55684, 69605, 139210, 278420, 1406021, 2812042, 5624084, 7030105, 14060210, 28120420]

約数ペア:

[(1, 28120420), (2, 14060210), (4, 7030105), (5, 5624084), (10, 2812042), (20, 1406021), (101, 278420), (202, 139210), (404, 69605), (505, 55684), (1010, 27842), (2020, 13921)]