21150315

素因数分解:

$3^4\times 5^1\times {\mathrm{52223}}^1$

素因数の和:52240

約数の個数: 20

約数和(自身を含む): 37914624

約数和(自身を除く): 16764309

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 52223, 156669, 261115, 470007, 783345, 1410021, 2350035, 4230063, 7050105, 21150315]

約数ペア:

[(1, 21150315), (3, 7050105), (5, 4230063), (9, 2350035), (15, 1410021), (27, 783345), (45, 470007), (81, 261115), (135, 156669), (405, 52223)]