81644815

素因数分解:

$5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{21401}}^1$

素因数の和:21522

約数の個数: 16

約数和(自身を含む): 113002560

約数和(自身を除く): 31357745

約数列:

[1, 5, 7, 35, 109, 545, 763, 3815, 21401, 107005, 149807, 749035, 2332709, 11663545, 16328963, 81644815]

約数ペア:

[(1, 81644815), (5, 16328963), (7, 11663545), (35, 2332709), (109, 749035), (545, 149807), (763, 107005), (3815, 21401)]