81628281

素因数分解:

$3^2\times 7^1\times {\mathrm{163}}^1\times {\mathrm{7949}}^1$

素因数の和:8125

約数の個数: 24

約数和(自身を含む): 135595200

約数和(自身を除く): 53966919

約数列:

[1, 3, 7, 9, 21, 63, 163, 489, 1141, 1467, 3423, 7949, 10269, 23847, 55643, 71541, 166929, 500787, 1295687, 3887061, 9069809, 11661183, 27209427, 81628281]

約数ペア:

[(1, 81628281), (3, 27209427), (7, 11661183), (9, 9069809), (21, 3887061), (63, 1295687), (163, 500787), (489, 166929), (1141, 71541), (1467, 55643), (3423, 23847), (7949, 10269)]