21186225

素因数分解:

$3^3\times 5^2\times {\mathrm{31387}}^1$

素因数の和:31406

約数の個数: 24

約数和(自身を含む): 38921120

約数和(自身を除く): 17734895

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 75, 135, 225, 675, 31387, 94161, 156935, 282483, 470805, 784675, 847449, 1412415, 2354025, 4237245, 7062075, 21186225]

約数ペア:

[(1, 21186225), (3, 7062075), (5, 4237245), (9, 2354025), (15, 1412415), (25, 847449), (27, 784675), (45, 470805), (75, 282483), (135, 156935), (225, 94161), (675, 31387)]