20356880

素因数分解:

$2^4\times 5^1\times {\mathrm{254461}}^1$

素因数の和:254474

約数の個数: 20

約数和(自身を含む): 47329932

約数和(自身を除く): 26973052

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 254461, 508922, 1017844, 1272305, 2035688, 2544610, 4071376, 5089220, 10178440, 20356880]

約数ペア:

[(1, 20356880), (2, 10178440), (4, 5089220), (5, 4071376), (8, 2544610), (10, 2035688), (16, 1272305), (20, 1017844), (40, 508922), (80, 254461)]