19871739

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{1471}}^1$

素因数の和:1575

約数の個数: 24

約数和(自身を含む): 30617600

約数和(自身を除く): 10745861

約数列:

[1, 3, 9, 19, 57, 79, 171, 237, 711, 1471, 1501, 4413, 4503, 13239, 13509, 27949, 83847, 116209, 251541, 348627, 1045881, 2207971, 6623913, 19871739]

約数ペア:

[(1, 19871739), (3, 6623913), (9, 2207971), (19, 1045881), (57, 348627), (79, 251541), (171, 116209), (237, 83847), (711, 27949), (1471, 13509), (1501, 13239), (4413, 4503)]