21889021

素因数分解:

$7^1\times {\mathrm{11}}^2\times {\mathrm{43}}^1\times {\mathrm{601}}^1$

素因数の和:673

約数の個数: 24

約数和(自身を含む): 28183232

約数和(自身を除く): 6294211

約数列:

[1, 7, 11, 43, 77, 121, 301, 473, 601, 847, 3311, 4207, 5203, 6611, 25843, 36421, 46277, 72721, 180901, 284273, 509047, 1989911, 3127003, 21889021]

約数ペア:

[(1, 21889021), (7, 3127003), (11, 1989911), (43, 509047), (77, 284273), (121, 180901), (301, 72721), (473, 46277), (601, 36421), (847, 25843), (3311, 6611), (4207, 5203)]