21265551

素因数分解:

$3^3\times {\mathrm{137}}^1\times {\mathrm{5749}}^1$

素因数の和:5895

約数の個数: 16

約数和(自身を含む): 31740000

約数和(自身を除く): 10474449

約数列:

[1, 3, 9, 27, 137, 411, 1233, 3699, 5749, 17247, 51741, 155223, 787613, 2362839, 7088517, 21265551]

約数ペア:

[(1, 21265551), (3, 7088517), (9, 2362839), (27, 787613), (137, 155223), (411, 51741), (1233, 17247), (3699, 5749)]