21380804575

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{65787091}}^1$

素因数の和:65787114

約数の個数: 12

約数和(自身を含む): 28551597928

約数和(自身を除く): 7170793353

約数列:

[1, 5, 13, 25, 65, 325, 65787091, 328935455, 855232183, 1644677275, 4276160915, 21380804575]

約数ペア:

[(1, 21380804575), (5, 4276160915), (13, 1644677275), (25, 855232183), (65, 328935455), (325, 65787091)]