20040725

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{1361}}^1$

素因数の和:1421

約数の個数: 24

約数和(自身を含む): 27022080

約数和(自身を除く): 6981355

約数列:

[1, 5, 19, 25, 31, 95, 155, 475, 589, 775, 1361, 2945, 6805, 14725, 25859, 34025, 42191, 129295, 210955, 646475, 801629, 1054775, 4008145, 20040725]

約数ペア:

[(1, 20040725), (5, 4008145), (19, 1054775), (25, 801629), (31, 646475), (95, 210955), (155, 129295), (475, 42191), (589, 34025), (775, 25859), (1361, 14725), (2945, 6805)]