978180845

素因数分解:

$5^1\times {\mathrm{71}}^2\times {\mathrm{197}}^2$

素因数の和:541

約数の個数: 18

約数和(自身を含む): 1196656746

約数和(自身を除く): 218475901

約数列:

[1, 5, 71, 197, 355, 985, 5041, 13987, 25205, 38809, 69935, 194045, 993077, 2755439, 4965385, 13777195, 195636169, 978180845]

約数ペア:

[(1, 978180845), (5, 195636169), (71, 13777195), (197, 4965385), (355, 2755439), (985, 993077), (5041, 194045), (13987, 69935), (25205, 38809)]