21388419

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{5897}}^1$

素因数の和:5947

約数の個数: 24

約数和(自身を含む): 34349952

約数和(自身を除く): 12961533

約数列:

[1, 3, 9, 13, 31, 39, 93, 117, 279, 403, 1209, 3627, 5897, 17691, 53073, 76661, 182807, 229983, 548421, 689949, 1645263, 2376491, 7129473, 21388419]

約数ペア:

[(1, 21388419), (3, 7129473), (9, 2376491), (13, 1645263), (31, 689949), (39, 548421), (93, 229983), (117, 182807), (279, 76661), (403, 53073), (1209, 17691), (3627, 5897)]