20388560

素因数分解:

$2^4\times 5^1\times {\mathrm{254857}}^1$

素因数の和:254870

約数の個数: 20

約数和(自身を含む): 47403588

約数和(自身を除く): 27015028

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 254857, 509714, 1019428, 1274285, 2038856, 2548570, 4077712, 5097140, 10194280, 20388560]

約数ペア:

[(1, 20388560), (2, 10194280), (4, 5097140), (5, 4077712), (8, 2548570), (10, 2038856), (16, 1274285), (20, 1019428), (40, 509714), (80, 254857)]