21538880

素因数分解:

$2^6\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{211}}^1$

素因数の和:268

約数の個数: 112

約数和(自身を含む): 58155840

約数和(自身を除く): 36616960

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 29, 32, 40, 44, 55, 58, 64, 80, 88, 110, 116, 145, 160, 176, 211, 220, 232, 290, 319, 320, 352, 422, 440, 464, 580, 638, 704, 844, 880, 928, 1055, 1160, 1276, 1595, 1688, 1760, 1856, 2110, 2320, 2321, 2552, 3190, 3376, 3520, 4220, 4640, 4642, 5104, 6119, 6380, 6752, 8440, 9280, 9284, 10208, 11605, 12238, 12760, 13504, 16880, 18568, 20416, 23210, 24476, 25520, 30595, 33760, 37136, 46420, 48952, 51040, 61190, 67309, 67520, 74272, 92840, 97904, 102080, 122380, 134618, 148544, 185680, 195808, 244760, 269236, 336545, 371360, 391616, 489520, 538472, 673090, 742720, 979040, 1076944, 1346180, 1958080, 2153888, 2692360, 4307776, 5384720, 10769440, 21538880]

約数ペア:

[(1, 21538880), (2, 10769440), (4, 5384720), (5, 4307776), (8, 2692360), (10, 2153888), (11, 1958080), (16, 1346180), (20, 1076944), (22, 979040), (29, 742720), (32, 673090), (40, 538472), (44, 489520), (55, 391616), (58, 371360), (64, 336545), (80, 269236), (88, 244760), (110, 195808), (116, 185680), (145, 148544), (160, 134618), (176, 122380), (211, 102080), (220, 97904), (232, 92840), (290, 74272), (319, 67520), (320, 67309), (352, 61190), (422, 51040), (440, 48952), (464, 46420), (580, 37136), (638, 33760), (704, 30595), (844, 25520), (880, 24476), (928, 23210), (1055, 20416), (1160, 18568), (1276, 16880), (1595, 13504), (1688, 12760), (1760, 12238), (1856, 11605), (2110, 10208), (2320, 9284), (2321, 9280), (2552, 8440), (3190, 6752), (3376, 6380), (3520, 6119), (4220, 5104), (4640, 4642)]