19781505

素因数分解:

$3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{10223}}^1$

素因数の和:10277

約数の個数: 24

約数和(自身を含む): 35088768

約数和(自身を除く): 15307263

約数列:

[1, 3, 5, 9, 15, 43, 45, 129, 215, 387, 645, 1935, 10223, 30669, 51115, 92007, 153345, 439589, 460035, 1318767, 2197945, 3956301, 6593835, 19781505]

約数ペア:

[(1, 19781505), (3, 6593835), (5, 3956301), (9, 2197945), (15, 1318767), (43, 460035), (45, 439589), (129, 153345), (215, 92007), (387, 51115), (645, 30669), (1935, 10223)]