21816639

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{263}}^1\times {\mathrm{709}}^1$

素因数の和:991

約数の個数: 24

約数和(自身を含む): 34114080

約数和(自身を除く): 12297441

約数列:

[1, 3, 9, 13, 39, 117, 263, 709, 789, 2127, 2367, 3419, 6381, 9217, 10257, 27651, 30771, 82953, 186467, 559401, 1678203, 2424071, 7272213, 21816639]

約数ペア:

[(1, 21816639), (3, 7272213), (9, 2424071), (13, 1678203), (39, 559401), (117, 186467), (263, 82953), (709, 30771), (789, 27651), (2127, 10257), (2367, 9217), (3419, 6381)]