12720609

素因数分解:

$3^2\times {\mathrm{11}}^2\times {\mathrm{11681}}^1$

素因数の和:11709

約数の個数: 18

約数和(自身を含む): 20198178

約数和(自身を除く): 7477569

約数列:

[1, 3, 9, 11, 33, 99, 121, 363, 1089, 11681, 35043, 105129, 128491, 385473, 1156419, 1413401, 4240203, 12720609]

約数ペア:

[(1, 12720609), (3, 4240203), (9, 1413401), (11, 1156419), (33, 385473), (99, 128491), (121, 105129), (363, 35043), (1089, 11681)]