21513843

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{20431}}^1$

素因数の和:20456

約数の個数: 20

約数和(自身を含む): 34611808

約数和(自身を除く): 13097965

約数列:

[1, 3, 9, 13, 27, 39, 81, 117, 351, 1053, 20431, 61293, 183879, 265603, 551637, 796809, 1654911, 2390427, 7171281, 21513843]

約数ペア:

[(1, 21513843), (3, 7171281), (9, 2390427), (13, 1654911), (27, 796809), (39, 551637), (81, 265603), (117, 183879), (351, 61293), (1053, 20431)]