21219999

素因数分解:

$3^1\times {\mathrm{59}}^1\times {\mathrm{101}}^1\times {\mathrm{1187}}^1$

素因数の和:1350

約数の個数: 16

約数和(自身を含む): 29082240

約数和(自身を除く): 7862241

約数列:

[1, 3, 59, 101, 177, 303, 1187, 3561, 5959, 17877, 70033, 119887, 210099, 359661, 7073333, 21219999]

約数ペア:

[(1, 21219999), (3, 7073333), (59, 359661), (101, 210099), (177, 119887), (303, 70033), (1187, 17877), (3561, 5959)]