20981960

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{14177}}^1$

素因数の和:14225

約数の個数: 32

約数和(自身を含む): 48488760

約数和(自身を除く): 27506800

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 74, 148, 185, 296, 370, 740, 1480, 14177, 28354, 56708, 70885, 113416, 141770, 283540, 524549, 567080, 1049098, 2098196, 2622745, 4196392, 5245490, 10490980, 20981960]

約数ペア:

[(1, 20981960), (2, 10490980), (4, 5245490), (5, 4196392), (8, 2622745), (10, 2098196), (20, 1049098), (37, 567080), (40, 524549), (74, 283540), (148, 141770), (185, 113416), (296, 70885), (370, 56708), (740, 28354), (1480, 14177)]