20417500

素因数分解:

$2^2\times 5^4\times {\mathrm{8167}}^1$

素因数の和:8191

約数の個数: 30

約数和(自身を含む): 44654456

約数和(自身を除く): 24236956

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 125, 250, 500, 625, 1250, 2500, 8167, 16334, 32668, 40835, 81670, 163340, 204175, 408350, 816700, 1020875, 2041750, 4083500, 5104375, 10208750, 20417500]

約数ペア:

[(1, 20417500), (2, 10208750), (4, 5104375), (5, 4083500), (10, 2041750), (20, 1020875), (25, 816700), (50, 408350), (100, 204175), (125, 163340), (250, 81670), (500, 40835), (625, 32668), (1250, 16334), (2500, 8167)]