18131525

素因数分解:

$5^2\times {\mathrm{29}}^1\times {\mathrm{89}}^1\times {\mathrm{281}}^1$

素因数の和:409

約数の個数: 24

約数和(自身を含む): 23603400

約数和(自身を除く): 5471875

約数列:

[1, 5, 25, 29, 89, 145, 281, 445, 725, 1405, 2225, 2581, 7025, 8149, 12905, 25009, 40745, 64525, 125045, 203725, 625225, 725261, 3626305, 18131525]

約数ペア:

[(1, 18131525), (5, 3626305), (25, 725261), (29, 625225), (89, 203725), (145, 125045), (281, 64525), (445, 40745), (725, 25009), (1405, 12905), (2225, 8149), (2581, 7025)]