20381265

素因数分解:

$3^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{12241}}^1$

素因数の和:12289

約数の個数: 24

約数和(自身を含む): 36285288

約数和(自身を除く): 15904023

約数列:

[1, 3, 5, 9, 15, 37, 45, 111, 185, 333, 555, 1665, 12241, 36723, 61205, 110169, 183615, 452917, 550845, 1358751, 2264585, 4076253, 6793755, 20381265]

約数ペア:

[(1, 20381265), (3, 6793755), (5, 4076253), (9, 2264585), (15, 1358751), (37, 550845), (45, 452917), (111, 183615), (185, 110169), (333, 61205), (555, 36723), (1665, 12241)]