20877415

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{797}}^1$

素因数の和:859

約数の個数: 24

約数和(自身を含む): 28038528

約数和(自身を除く): 7161113

約数列:

[1, 5, 13, 31, 65, 155, 169, 403, 797, 845, 2015, 3985, 5239, 10361, 24707, 26195, 51805, 123535, 134693, 321191, 673465, 1605955, 4175483, 20877415]

約数ペア:

[(1, 20877415), (5, 4175483), (13, 1605955), (31, 673465), (65, 321191), (155, 134693), (169, 123535), (403, 51805), (797, 26195), (845, 24707), (2015, 10361), (3985, 5239)]