18729425

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{13}}^3\times {\mathrm{31}}^1$

素因数の和:91

約数の個数: 48

約数和(自身を含む): 28331520

約数和(自身を除く): 9602095

約数列:

[1, 5, 11, 13, 25, 31, 55, 65, 143, 155, 169, 275, 325, 341, 403, 715, 775, 845, 1705, 1859, 2015, 2197, 3575, 4225, 4433, 5239, 8525, 9295, 10075, 10985, 22165, 24167, 26195, 46475, 54925, 57629, 68107, 110825, 120835, 130975, 288145, 340535, 604175, 749177, 1440725, 1702675, 3745885, 18729425]

約数ペア:

[(1, 18729425), (5, 3745885), (11, 1702675), (13, 1440725), (25, 749177), (31, 604175), (55, 340535), (65, 288145), (143, 130975), (155, 120835), (169, 110825), (275, 68107), (325, 57629), (341, 54925), (403, 46475), (715, 26195), (775, 24167), (845, 22165), (1705, 10985), (1859, 10075), (2015, 9295), (2197, 8525), (3575, 5239), (4225, 4433)]