21065175

素因数分解:

$3^2\times 5^2\times {\mathrm{251}}^1\times {\mathrm{373}}^1$

素因数の和:640

約数の個数: 36

約数和(自身を含む): 37981944

約数和(自身を除く): 16916769

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 225, 251, 373, 753, 1119, 1255, 1865, 2259, 3357, 3765, 5595, 6275, 9325, 11295, 16785, 18825, 27975, 56475, 83925, 93623, 280869, 468115, 842607, 1404345, 2340575, 4213035, 7021725, 21065175]

約数ペア:

[(1, 21065175), (3, 7021725), (5, 4213035), (9, 2340575), (15, 1404345), (25, 842607), (45, 468115), (75, 280869), (225, 93623), (251, 83925), (373, 56475), (753, 27975), (1119, 18825), (1255, 16785), (1865, 11295), (2259, 9325), (3357, 6275), (3765, 5595)]