28691691

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{71909}}^1$

素因数の和:71938

約数の個数: 16

約数和(自身を含む): 46022400

約数和(自身を除く): 17330709

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 71909, 215727, 503363, 1366271, 1510089, 4098813, 9563897, 28691691]

約数ペア:

[(1, 28691691), (3, 9563897), (7, 4098813), (19, 1510089), (21, 1366271), (57, 503363), (133, 215727), (399, 71909)]