20491025

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{179}}^1\times {\mathrm{241}}^1$

素因数の和:449

約数の個数: 24

約数和(自身を含む): 27007200

約数和(自身を除く): 6516175

約数列:

[1, 5, 19, 25, 95, 179, 241, 475, 895, 1205, 3401, 4475, 4579, 6025, 17005, 22895, 43139, 85025, 114475, 215695, 819641, 1078475, 4098205, 20491025]

約数ペア:

[(1, 20491025), (5, 4098205), (19, 1078475), (25, 819641), (95, 215695), (179, 114475), (241, 85025), (475, 43139), (895, 22895), (1205, 17005), (3401, 6025), (4475, 4579)]