20997145

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{3019}}^1$

素因数の和:3144

約数の個数: 16

約数和(自身を含む): 27397440

約数和(自身を除く): 6400295

約数列:

[1, 5, 13, 65, 107, 535, 1391, 3019, 6955, 15095, 39247, 196235, 323033, 1615165, 4199429, 20997145]

約数ペア:

[(1, 20997145), (5, 4199429), (13, 1615165), (65, 323033), (107, 196235), (535, 39247), (1391, 15095), (3019, 6955)]