2781025

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{199}}^1$

素因数の和:265

約数の個数: 24

約数和(自身を含む): 3819200

約数和(自身を除く): 1038175

約数列:

[1, 5, 13, 25, 43, 65, 199, 215, 325, 559, 995, 1075, 2587, 2795, 4975, 8557, 12935, 13975, 42785, 64675, 111241, 213925, 556205, 2781025]

約数ペア:

[(1, 2781025), (5, 556205), (13, 213925), (25, 111241), (43, 64675), (65, 42785), (199, 13975), (215, 12935), (325, 8557), (559, 4975), (995, 2795), (1075, 2587)]