1620855

素因数分解:

$3^2\times 5^1\times {\mathrm{181}}^1\times {\mathrm{199}}^1$

素因数の和:391

約数の個数: 24

約数和(自身を含む): 2839200

約数和(自身を除く): 1218345

約数列:

[1, 3, 5, 9, 15, 45, 181, 199, 543, 597, 905, 995, 1629, 1791, 2715, 2985, 8145, 8955, 36019, 108057, 180095, 324171, 540285, 1620855]

約数ペア:

[(1, 1620855), (3, 540285), (5, 324171), (9, 180095), (15, 108057), (45, 36019), (181, 8955), (199, 8145), (543, 2985), (597, 2715), (905, 1791), (995, 1629)]