21250

素因数分解:

$2^1\times 5^4\times {\mathrm{17}}^1$

素因数の和:39

約数の個数: 20

約数和(自身を含む): 42174

約数和(自身を除く): 20924

約数列:

[1, 2, 5, 10, 17, 25, 34, 50, 85, 125, 170, 250, 425, 625, 850, 1250, 2125, 4250, 10625, 21250]

約数ペア:

[(1, 21250), (2, 10625), (5, 4250), (10, 2125), (17, 1250), (25, 850), (34, 625), (50, 425), (85, 250), (125, 170)]