12861745

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{491}}^1$

素因数の和:553

約数の個数: 24

約数和(自身を含む): 17286912

約数和(自身を除く): 4425167

約数列:

[1, 5, 13, 31, 65, 155, 169, 403, 491, 845, 2015, 2455, 5239, 6383, 15221, 26195, 31915, 76105, 82979, 197873, 414895, 989365, 2572349, 12861745]

約数ペア:

[(1, 12861745), (5, 2572349), (13, 989365), (31, 414895), (65, 197873), (155, 82979), (169, 76105), (403, 31915), (491, 26195), (845, 15221), (2015, 6383), (2455, 5239)]