18979940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{135571}}^1$

素因数の和:135587

約数の個数: 24

約数和(自身を含む): 45552192

約数和(自身を除く): 26572252

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 135571, 271142, 542284, 677855, 948997, 1355710, 1897994, 2711420, 3795988, 4744985, 9489970, 18979940]

約数ペア:

[(1, 18979940), (2, 9489970), (4, 4744985), (5, 3795988), (7, 2711420), (10, 1897994), (14, 1355710), (20, 948997), (28, 677855), (35, 542284), (70, 271142), (140, 135571)]