19997805

素因数分解:

$3^1\times 5^1\times {\mathrm{131}}^1\times {\mathrm{10177}}^1$

素因数の和:10316

約数の個数: 16

約数和(自身を含む): 32243904

約数和(自身を除く): 12246099

約数列:

[1, 3, 5, 15, 131, 393, 655, 1965, 10177, 30531, 50885, 152655, 1333187, 3999561, 6665935, 19997805]

約数ペア:

[(1, 19997805), (3, 6665935), (5, 3999561), (15, 1333187), (131, 152655), (393, 50885), (655, 30531), (1965, 10177)]