18009980

素因数分解:

$2^2\times 5^1\times {\mathrm{769}}^1\times {\mathrm{1171}}^1$

素因数の和:1949

約数の個数: 24

約数和(自身を含む): 37902480

約数和(自身を除く): 19892500

約数列:

[1, 2, 4, 5, 10, 20, 769, 1171, 1538, 2342, 3076, 3845, 4684, 5855, 7690, 11710, 15380, 23420, 900499, 1800998, 3601996, 4502495, 9004990, 18009980]

約数ペア:

[(1, 18009980), (2, 9004990), (4, 4502495), (5, 3601996), (10, 1800998), (20, 900499), (769, 23420), (1171, 15380), (1538, 11710), (2342, 7690), (3076, 5855), (3845, 4684)]