20427500

素因数分解:

$2^2\times 5^4\times {\mathrm{8171}}^1$

素因数の和:8195

約数の個数: 30

約数和(自身を含む): 44676324

約数和(自身を除く): 24248824

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 125, 250, 500, 625, 1250, 2500, 8171, 16342, 32684, 40855, 81710, 163420, 204275, 408550, 817100, 1021375, 2042750, 4085500, 5106875, 10213750, 20427500]

約数ペア:

[(1, 20427500), (2, 10213750), (4, 5106875), (5, 4085500), (10, 2042750), (20, 1021375), (25, 817100), (50, 408550), (100, 204275), (125, 163420), (250, 81710), (500, 40855), (625, 32684), (1250, 16342), (2500, 8171)]