20821968

素因数分解:

$2^4\times 3^3\times {\mathrm{157}}^1\times {\mathrm{307}}^1$

素因数の和:481

約数の個数: 80

約数和(自身を含む): 60343360

約数和(自身を除く): 39521392

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 27, 36, 48, 54, 72, 108, 144, 157, 216, 307, 314, 432, 471, 614, 628, 921, 942, 1228, 1256, 1413, 1842, 1884, 2456, 2512, 2763, 2826, 3684, 3768, 4239, 4912, 5526, 5652, 7368, 7536, 8289, 8478, 11052, 11304, 14736, 16578, 16956, 22104, 22608, 33156, 33912, 44208, 48199, 66312, 67824, 96398, 132624, 144597, 192796, 289194, 385592, 433791, 578388, 771184, 867582, 1156776, 1301373, 1735164, 2313552, 2602746, 3470328, 5205492, 6940656, 10410984, 20821968]

約数ペア:

[(1, 20821968), (2, 10410984), (3, 6940656), (4, 5205492), (6, 3470328), (8, 2602746), (9, 2313552), (12, 1735164), (16, 1301373), (18, 1156776), (24, 867582), (27, 771184), (36, 578388), (48, 433791), (54, 385592), (72, 289194), (108, 192796), (144, 144597), (157, 132624), (216, 96398), (307, 67824), (314, 66312), (432, 48199), (471, 44208), (614, 33912), (628, 33156), (921, 22608), (942, 22104), (1228, 16956), (1256, 16578), (1413, 14736), (1842, 11304), (1884, 11052), (2456, 8478), (2512, 8289), (2763, 7536), (2826, 7368), (3684, 5652), (3768, 5526), (4239, 4912)]