28400787

素因数分解:

$3^4\times {\mathrm{547}}^1\times {\mathrm{641}}^1$

素因数の和:1200

約数の個数: 20

約数和(自身を含む): 42569736

約数和(自身を除く): 14168949

約数列:

[1, 3, 9, 27, 81, 547, 641, 1641, 1923, 4923, 5769, 14769, 17307, 44307, 51921, 350627, 1051881, 3155643, 9466929, 28400787]

約数ペア:

[(1, 28400787), (3, 9466929), (9, 3155643), (27, 1051881), (81, 350627), (547, 51921), (641, 44307), (1641, 17307), (1923, 14769), (4923, 5769)]