21385275

素因数分解:

$3^1\times 5^2\times {\mathrm{389}}^1\times {\mathrm{733}}^1$

素因数の和:1135

約数の個数: 24

約数和(自身を含む): 35496240

約数和(自身を除く): 14110965

約数列:

[1, 3, 5, 15, 25, 75, 389, 733, 1167, 1945, 2199, 3665, 5835, 9725, 10995, 18325, 29175, 54975, 285137, 855411, 1425685, 4277055, 7128425, 21385275]

約数ペア:

[(1, 21385275), (3, 7128425), (5, 4277055), (15, 1425685), (25, 855411), (75, 285137), (389, 54975), (733, 29175), (1167, 18325), (1945, 10995), (2199, 9725), (3665, 5835)]