18776885

素因数分解:

$5^1\times {\mathrm{109}}^1\times {\mathrm{131}}^1\times {\mathrm{263}}^1$

素因数の和:508

約数の個数: 16

約数和(自身を含む): 22999680

約数和(自身を除く): 4222795

約数列:

[1, 5, 109, 131, 263, 545, 655, 1315, 14279, 28667, 34453, 71395, 143335, 172265, 3755377, 18776885]

約数ペア:

[(1, 18776885), (5, 3755377), (109, 172265), (131, 143335), (263, 71395), (545, 34453), (655, 28667), (1315, 14279)]