20428375

素因数分解:

$5^3\times {\mathrm{11}}^1\times {\mathrm{83}}^1\times {\mathrm{179}}^1$

素因数の和:288

約数の個数: 32

約数和(自身を含む): 28304640

約数和(自身を除く): 7876265

約数列:

[1, 5, 11, 25, 55, 83, 125, 179, 275, 415, 895, 913, 1375, 1969, 2075, 4475, 4565, 9845, 10375, 14857, 22375, 22825, 49225, 74285, 114125, 163427, 246125, 371425, 817135, 1857125, 4085675, 20428375]

約数ペア:

[(1, 20428375), (5, 4085675), (11, 1857125), (25, 817135), (55, 371425), (83, 246125), (125, 163427), (179, 114125), (275, 74285), (415, 49225), (895, 22825), (913, 22375), (1375, 14857), (1969, 10375), (2075, 9845), (4475, 4565)]