20742500

素因数分解:

$2^2\times 5^4\times {\mathrm{8297}}^1$

素因数の和:8321

約数の個数: 30

約数和(自身を含む): 45365166

約数和(自身を除く): 24622666

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 125, 250, 500, 625, 1250, 2500, 8297, 16594, 33188, 41485, 82970, 165940, 207425, 414850, 829700, 1037125, 2074250, 4148500, 5185625, 10371250, 20742500]

約数ペア:

[(1, 20742500), (2, 10371250), (4, 5185625), (5, 4148500), (10, 2074250), (20, 1037125), (25, 829700), (50, 414850), (100, 207425), (125, 165940), (250, 82970), (500, 41485), (625, 33188), (1250, 16594), (2500, 8297)]