21781359

素因数分解:

$3^3\times {\mathrm{181}}^1\times {\mathrm{4457}}^1$

素因数の和:4647

約数の個数: 16

約数和(自身を含む): 32454240

約数和(自身を除く): 10672881

約数列:

[1, 3, 9, 27, 181, 543, 1629, 4457, 4887, 13371, 40113, 120339, 806717, 2420151, 7260453, 21781359]

約数ペア:

[(1, 21781359), (3, 7260453), (9, 2420151), (27, 806717), (181, 120339), (543, 40113), (1629, 13371), (4457, 4887)]