20997225

素因数分解:

$3^4\times 5^2\times {\mathrm{10369}}^1$

素因数の和:10391

約数の個数: 30

約数和(自身を含む): 38897870

約数和(自身を除く): 17900645

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 75, 81, 135, 225, 405, 675, 2025, 10369, 31107, 51845, 93321, 155535, 259225, 279963, 466605, 777675, 839889, 1399815, 2333025, 4199445, 6999075, 20997225]

約数ペア:

[(1, 20997225), (3, 6999075), (5, 4199445), (9, 2333025), (15, 1399815), (25, 839889), (27, 777675), (45, 466605), (75, 279963), (81, 259225), (135, 155535), (225, 93321), (405, 51845), (675, 31107), (2025, 10369)]