20719855

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{1103}}^1$

素因数の和:1155

約数の個数: 24

約数和(自身を含む): 28469952

約数和(自身を除く): 7750097

約数列:

[1, 5, 13, 17, 65, 85, 221, 289, 1103, 1105, 1445, 3757, 5515, 14339, 18751, 18785, 71695, 93755, 243763, 318767, 1218815, 1593835, 4143971, 20719855]

約数ペア:

[(1, 20719855), (5, 4143971), (13, 1593835), (17, 1218815), (65, 318767), (85, 243763), (221, 93755), (289, 71695), (1103, 18785), (1105, 18751), (1445, 14339), (3757, 5515)]