19990780

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{24379}}^1$

素因数の和:24429

約数の個数: 24

約数和(自身を含む): 43006320

約数和(自身を除く): 23015540

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 24379, 48758, 97516, 121895, 243790, 487580, 999539, 1999078, 3998156, 4997695, 9995390, 19990780]

約数ペア:

[(1, 19990780), (2, 9995390), (4, 4997695), (5, 3998156), (10, 1999078), (20, 999539), (41, 487580), (82, 243790), (164, 121895), (205, 97516), (410, 48758), (820, 24379)]