21087885

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{2207}}^1$

素因数の和:2242

約数の個数: 48

約数和(自身を含む): 42287616

約数和(自身を除く): 21199731

約数列:

[1, 3, 5, 7, 13, 15, 21, 35, 39, 49, 65, 91, 105, 147, 195, 245, 273, 455, 637, 735, 1365, 1911, 2207, 3185, 6621, 9555, 11035, 15449, 28691, 33105, 46347, 77245, 86073, 108143, 143455, 200837, 231735, 324429, 430365, 540715, 602511, 1004185, 1405859, 1622145, 3012555, 4217577, 7029295, 21087885]

約数ペア:

[(1, 21087885), (3, 7029295), (5, 4217577), (7, 3012555), (13, 1622145), (15, 1405859), (21, 1004185), (35, 602511), (39, 540715), (49, 430365), (65, 324429), (91, 231735), (105, 200837), (147, 143455), (195, 108143), (245, 86073), (273, 77245), (455, 46347), (637, 33105), (735, 28691), (1365, 15449), (1911, 11035), (2207, 9555), (3185, 6621)]