19815760

素因数分解:

$2^4\times 5^1\times {\mathrm{247697}}^1$

素因数の和:247710

約数の個数: 20

約数和(自身を含む): 46071828

約数和(自身を除く): 26256068

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 247697, 495394, 990788, 1238485, 1981576, 2476970, 3963152, 4953940, 9907880, 19815760]

約数ペア:

[(1, 19815760), (2, 9907880), (4, 4953940), (5, 3963152), (8, 2476970), (10, 1981576), (16, 1238485), (20, 990788), (40, 495394), (80, 247697)]