20986395

素因数分解:

$3^1\times 5^1\times {\mathrm{439}}^1\times {\mathrm{3187}}^1$

素因数の和:3634

約数の個数: 16

約数和(自身を含む): 33665280

約数和(自身を除く): 12678885

約数列:

[1, 3, 5, 15, 439, 1317, 2195, 3187, 6585, 9561, 15935, 47805, 1399093, 4197279, 6995465, 20986395]

約数ペア:

[(1, 20986395), (3, 6995465), (5, 4197279), (15, 1399093), (439, 47805), (1317, 15935), (2195, 9561), (3187, 6585)]