20390320

素因数分解:

$2^4\times 5^1\times {\mathrm{254879}}^1$

素因数の和:254892

約数の個数: 20

約数和(自身を含む): 47407680

約数和(自身を除く): 27017360

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 254879, 509758, 1019516, 1274395, 2039032, 2548790, 4078064, 5097580, 10195160, 20390320]

約数ペア:

[(1, 20390320), (2, 10195160), (4, 5097580), (5, 4078064), (8, 2548790), (10, 2039032), (16, 1274395), (20, 1019516), (40, 509758), (80, 254879)]