19613680

素因数分解:

$2^4\times 5^1\times {\mathrm{245171}}^1$

素因数の和:245184

約数の個数: 20

約数和(自身を含む): 45601992

約数和(自身を除く): 25988312

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 245171, 490342, 980684, 1225855, 1961368, 2451710, 3922736, 4903420, 9806840, 19613680]

約数ペア:

[(1, 19613680), (2, 9806840), (4, 4903420), (5, 3922736), (8, 2451710), (10, 1961368), (16, 1225855), (20, 980684), (40, 490342), (80, 245171)]