257208910

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{78179}}^1$

素因数の和:78240

約数の個数: 32

約数和(自身を含む): 540380160

約数和(自身を除く): 283171250

約数列:

[1, 2, 5, 7, 10, 14, 35, 47, 70, 94, 235, 329, 470, 658, 1645, 3290, 78179, 156358, 390895, 547253, 781790, 1094506, 2736265, 3674413, 5472530, 7348826, 18372065, 25720891, 36744130, 51441782, 128604455, 257208910]

約数ペア:

[(1, 257208910), (2, 128604455), (5, 51441782), (7, 36744130), (10, 25720891), (14, 18372065), (35, 7348826), (47, 5472530), (70, 3674413), (94, 2736265), (235, 1094506), (329, 781790), (470, 547253), (658, 390895), (1645, 156358), (3290, 78179)]