21812500

素因数分解:

$2^2\times 5^6\times {\mathrm{349}}^1$

素因数の和:383

約数の個数: 42

約数和(自身を含む): 47850950

約数和(自身を除く): 26038450

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 125, 250, 349, 500, 625, 698, 1250, 1396, 1745, 2500, 3125, 3490, 6250, 6980, 8725, 12500, 15625, 17450, 31250, 34900, 43625, 62500, 87250, 174500, 218125, 436250, 872500, 1090625, 2181250, 4362500, 5453125, 10906250, 21812500]

約数ペア:

[(1, 21812500), (2, 10906250), (4, 5453125), (5, 4362500), (10, 2181250), (20, 1090625), (25, 872500), (50, 436250), (100, 218125), (125, 174500), (250, 87250), (349, 62500), (500, 43625), (625, 34900), (698, 31250), (1250, 17450), (1396, 15625), (1745, 12500), (2500, 8725), (3125, 6980), (3490, 6250)]