19959980

素因数分解:

$2^2\times 5^1\times {\mathrm{311}}^1\times {\mathrm{3209}}^1$

素因数の和:3529

約数の個数: 24

約数和(自身を含む): 42063840

約数和(自身を除く): 22103860

約数列:

[1, 2, 4, 5, 10, 20, 311, 622, 1244, 1555, 3110, 3209, 6220, 6418, 12836, 16045, 32090, 64180, 997999, 1995998, 3991996, 4989995, 9979990, 19959980]

約数ペア:

[(1, 19959980), (2, 9979990), (4, 4989995), (5, 3991996), (10, 1995998), (20, 997999), (311, 64180), (622, 32090), (1244, 16045), (1555, 12836), (3110, 6418), (3209, 6220)]