20028745

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{223}}^1$

素因数の和:333

約数の個数: 32

約数和(自身を含む): 27869184

約数和(自身を除く): 7840439

約数列:

[1, 5, 11, 23, 55, 71, 115, 223, 253, 355, 781, 1115, 1265, 1633, 2453, 3905, 5129, 8165, 12265, 15833, 17963, 25645, 56419, 79165, 89815, 174163, 282095, 364159, 870815, 1820795, 4005749, 20028745]

約数ペア:

[(1, 20028745), (5, 4005749), (11, 1820795), (23, 870815), (55, 364159), (71, 282095), (115, 174163), (223, 89815), (253, 79165), (355, 56419), (781, 25645), (1115, 17963), (1265, 15833), (1633, 12265), (2453, 8165), (3905, 5129)]