20686225

素因数分解:

$5^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{2749}}^1$

素因数の和:2809

約数の個数: 24

約数和(自身を含む): 30008000

約数和(自身を除く): 9321775

約数列:

[1, 5, 7, 25, 35, 43, 175, 215, 301, 1075, 1505, 2749, 7525, 13745, 19243, 68725, 96215, 118207, 481075, 591035, 827449, 2955175, 4137245, 20686225]

約数ペア:

[(1, 20686225), (5, 4137245), (7, 2955175), (25, 827449), (35, 591035), (43, 481075), (175, 118207), (215, 96215), (301, 68725), (1075, 19243), (1505, 13745), (2749, 7525)]