28328645

素因数分解:

$5^1\times {\mathrm{71}}^1\times {\mathrm{199}}^1\times {\mathrm{401}}^1$

素因数の和:676

約数の個数: 16

約数和(自身を含む): 34732800

約数和(自身を除く): 6404155

約数列:

[1, 5, 71, 199, 355, 401, 995, 2005, 14129, 28471, 70645, 79799, 142355, 398995, 5665729, 28328645]

約数ペア:

[(1, 28328645), (5, 5665729), (71, 398995), (199, 142355), (355, 79799), (401, 70645), (995, 28471), (2005, 14129)]