21728240

素因数分解:

$2^4\times 5^1\times {\mathrm{271603}}^1$

素因数の和:271616

約数の個数: 20

約数和(自身を含む): 50518344

約数和(自身を除く): 28790104

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 271603, 543206, 1086412, 1358015, 2172824, 2716030, 4345648, 5432060, 10864120, 21728240]

約数ペア:

[(1, 21728240), (2, 10864120), (4, 5432060), (5, 4345648), (8, 2716030), (10, 2172824), (16, 1358015), (20, 1086412), (40, 543206), (80, 271603)]