28520121

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{71479}}^1$

素因数の和:71508

約数の個数: 16

約数和(自身を含む): 45747200

約数和(自身を除く): 17227079

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 71479, 214437, 500353, 1358101, 1501059, 4074303, 9506707, 28520121]

約数ペア:

[(1, 28520121), (3, 9506707), (7, 4074303), (19, 1501059), (21, 1358101), (57, 500353), (133, 214437), (399, 71479)]