19994640800

素因数分解:

$2^5\times 5^2\times {\mathrm{157}}^1\times {\mathrm{159193}}^1$

素因数の和:159370

約数の個数: 72

約数和(自身を含む): 49123129356

約数和(自身を除く): 29128488556

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 157, 160, 200, 314, 400, 628, 785, 800, 1256, 1570, 2512, 3140, 3925, 5024, 6280, 7850, 12560, 15700, 25120, 31400, 62800, 125600, 159193, 318386, 636772, 795965, 1273544, 1591930, 2547088, 3183860, 3979825, 5094176, 6367720, 7959650, 12735440, 15919300, 24993301, 25470880, 31838600, 49986602, 63677200, 99973204, 124966505, 127354400, 199946408, 249933010, 399892816, 499866020, 624832525, 799785632, 999732040, 1249665050, 1999464080, 2499330100, 3998928160, 4998660200, 9997320400, 19994640800]

約数ペア:

[(1, 19994640800), (2, 9997320400), (4, 4998660200), (5, 3998928160), (8, 2499330100), (10, 1999464080), (16, 1249665050), (20, 999732040), (25, 799785632), (32, 624832525), (40, 499866020), (50, 399892816), (80, 249933010), (100, 199946408), (157, 127354400), (160, 124966505), (200, 99973204), (314, 63677200), (400, 49986602), (628, 31838600), (785, 25470880), (800, 24993301), (1256, 15919300), (1570, 12735440), (2512, 7959650), (3140, 6367720), (3925, 5094176), (5024, 3979825), (6280, 3183860), (7850, 2547088), (12560, 1591930), (15700, 1273544), (25120, 795965), (31400, 636772), (62800, 318386), (125600, 159193)]