20519675

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{83}}^1$

素因数の和:164

約数の個数: 48

約数和(自身を含む): 29998080

約数和(自身を除く): 9478405

約数列:

[1, 5, 11, 25, 29, 31, 55, 83, 145, 155, 275, 319, 341, 415, 725, 775, 899, 913, 1595, 1705, 2075, 2407, 2573, 4495, 4565, 7975, 8525, 9889, 12035, 12865, 22475, 22825, 26477, 28303, 49445, 60175, 64325, 74617, 132385, 141515, 247225, 373085, 661925, 707575, 820787, 1865425, 4103935, 20519675]

約数ペア:

[(1, 20519675), (5, 4103935), (11, 1865425), (25, 820787), (29, 707575), (31, 661925), (55, 373085), (83, 247225), (145, 141515), (155, 132385), (275, 74617), (319, 64325), (341, 60175), (415, 49445), (725, 28303), (775, 26477), (899, 22825), (913, 22475), (1595, 12865), (1705, 12035), (2075, 9889), (2407, 8525), (2573, 7975), (4495, 4565)]