20507825

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{709}}^1$

素因数の和:821

約数の個数: 24

約数和(自身を含む): 27732600

約数和(自身を除く): 7224775

約数列:

[1, 5, 13, 25, 65, 89, 325, 445, 709, 1157, 2225, 3545, 5785, 9217, 17725, 28925, 46085, 63101, 230425, 315505, 820313, 1577525, 4101565, 20507825]

約数ペア:

[(1, 20507825), (5, 4101565), (13, 1577525), (25, 820313), (65, 315505), (89, 230425), (325, 63101), (445, 46085), (709, 28925), (1157, 17725), (2225, 9217), (3545, 5785)]