128913020

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{157211}}^1$

素因数の和:157261

約数の個数: 24

約数和(自身を含む): 277321968

約数和(自身を除く): 148408948

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 157211, 314422, 628844, 786055, 1572110, 3144220, 6445651, 12891302, 25782604, 32228255, 64456510, 128913020]

約数ペア:

[(1, 128913020), (2, 64456510), (4, 32228255), (5, 25782604), (10, 12891302), (20, 6445651), (41, 3144220), (82, 1572110), (164, 786055), (205, 628844), (410, 314422), (820, 157211)]