99972020

素因数分解:

$2^2\times 5^1\times {\mathrm{4998601}}^1$

素因数の和:4998610

約数の個数: 12

約数和(自身を含む): 209941284

約数和(自身を除く): 109969264

約数列:

[1, 2, 4, 5, 10, 20, 4998601, 9997202, 19994404, 24993005, 49986010, 99972020]

約数ペア:

[(1, 99972020), (2, 49986010), (4, 24993005), (5, 19994404), (10, 9997202), (20, 4998601)]