28684985

素因数分解:

$5^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{103}}^1\times {\mathrm{109}}^1$

素因数の和:297

約数の個数: 32

約数和(自身を含む): 40634880

約数和(自身を除く): 11949895

約数列:

[1, 5, 7, 35, 73, 103, 109, 365, 511, 515, 545, 721, 763, 2555, 3605, 3815, 7519, 7957, 11227, 37595, 39785, 52633, 55699, 56135, 78589, 263165, 278495, 392945, 819571, 4097855, 5736997, 28684985]

約数ペア:

[(1, 28684985), (5, 5736997), (7, 4097855), (35, 819571), (73, 392945), (103, 278495), (109, 263165), (365, 78589), (511, 56135), (515, 55699), (545, 52633), (721, 39785), (763, 37595), (2555, 11227), (3605, 7957), (3815, 7519)]