21990285

素因数分解:

$3^7\times 5^1\times {\mathrm{2011}}^1$

素因数の和:2037

約数の個数: 32

約数和(自身を含む): 39596160

約数和(自身を除く): 17605875

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 243, 405, 729, 1215, 2011, 2187, 3645, 6033, 10055, 10935, 18099, 30165, 54297, 90495, 162891, 271485, 488673, 814455, 1466019, 2443365, 4398057, 7330095, 21990285]

約数ペア:

[(1, 21990285), (3, 7330095), (5, 4398057), (9, 2443365), (15, 1466019), (27, 814455), (45, 488673), (81, 271485), (135, 162891), (243, 90495), (405, 54297), (729, 30165), (1215, 18099), (2011, 10935), (2187, 10055), (3645, 6033)]