20143955

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{769}}^1$

素因数の和:831

約数の個数: 24

約数和(自身を含む): 27054720

約数和(自身を除く): 6910765

約数列:

[1, 5, 13, 31, 65, 155, 169, 403, 769, 845, 2015, 3845, 5239, 9997, 23839, 26195, 49985, 119195, 129961, 309907, 649805, 1549535, 4028791, 20143955]

約数ペア:

[(1, 20143955), (5, 4028791), (13, 1549535), (31, 649805), (65, 309907), (155, 129961), (169, 119195), (403, 49985), (769, 26195), (845, 23839), (2015, 9997), (3845, 5239)]