207987775

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{599}}^1$

素因数の和:688

約数の個数: 48

約数和(自身を含む): 294624000

約数和(自身を除く): 86636225

約数列:

[1, 5, 17, 19, 25, 43, 85, 95, 215, 323, 425, 475, 599, 731, 817, 1075, 1615, 2995, 3655, 4085, 8075, 10183, 11381, 13889, 14975, 18275, 20425, 25757, 50915, 56905, 69445, 128785, 193477, 254575, 284525, 347225, 437869, 489383, 643925, 967385, 2189345, 2446915, 4836925, 8319511, 10946725, 12234575, 41597555, 207987775]

約数ペア:

[(1, 207987775), (5, 41597555), (17, 12234575), (19, 10946725), (25, 8319511), (43, 4836925), (85, 2446915), (95, 2189345), (215, 967385), (323, 643925), (425, 489383), (475, 437869), (599, 347225), (731, 284525), (817, 254575), (1075, 193477), (1615, 128785), (2995, 69445), (3655, 56905), (4085, 50915), (8075, 25757), (10183, 20425), (11381, 18275), (13889, 14975)]