400985

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{199}}^1$

素因数の和:248

約数の個数: 16

約数和(自身を含む): 537600

約数和(自身を除く): 136615

約数列:

[1, 5, 13, 31, 65, 155, 199, 403, 995, 2015, 2587, 6169, 12935, 30845, 80197, 400985]

約数ペア:

[(1, 400985), (5, 80197), (13, 30845), (31, 12935), (65, 6169), (155, 2587), (199, 2015), (403, 995)]