21871728

素因数分解:

$2^4\times 3^3\times {\mathrm{197}}^1\times {\mathrm{257}}^1$

素因数の和:471

約数の個数: 80

約数和(自身を含む): 63344160

約数和(自身を除く): 41472432

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 27, 36, 48, 54, 72, 108, 144, 197, 216, 257, 394, 432, 514, 591, 771, 788, 1028, 1182, 1542, 1576, 1773, 2056, 2313, 2364, 3084, 3152, 3546, 4112, 4626, 4728, 5319, 6168, 6939, 7092, 9252, 9456, 10638, 12336, 13878, 14184, 18504, 21276, 27756, 28368, 37008, 42552, 50629, 55512, 85104, 101258, 111024, 151887, 202516, 303774, 405032, 455661, 607548, 810064, 911322, 1215096, 1366983, 1822644, 2430192, 2733966, 3645288, 5467932, 7290576, 10935864, 21871728]

約数ペア:

[(1, 21871728), (2, 10935864), (3, 7290576), (4, 5467932), (6, 3645288), (8, 2733966), (9, 2430192), (12, 1822644), (16, 1366983), (18, 1215096), (24, 911322), (27, 810064), (36, 607548), (48, 455661), (54, 405032), (72, 303774), (108, 202516), (144, 151887), (197, 111024), (216, 101258), (257, 85104), (394, 55512), (432, 50629), (514, 42552), (591, 37008), (771, 28368), (788, 27756), (1028, 21276), (1182, 18504), (1542, 14184), (1576, 13878), (1773, 12336), (2056, 10638), (2313, 9456), (2364, 9252), (3084, 7092), (3152, 6939), (3546, 6168), (4112, 5319), (4626, 4728)]