20696720

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{811}}^1$

素因数の和:864

約数の個数: 80

約数和(自身を含む): 54371520

約数和(自身を除く): 33674800

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 29, 40, 44, 55, 58, 80, 88, 110, 116, 145, 176, 220, 232, 290, 319, 440, 464, 580, 638, 811, 880, 1160, 1276, 1595, 1622, 2320, 2552, 3190, 3244, 4055, 5104, 6380, 6488, 8110, 8921, 12760, 12976, 16220, 17842, 23519, 25520, 32440, 35684, 44605, 47038, 64880, 71368, 89210, 94076, 117595, 142736, 178420, 188152, 235190, 258709, 356840, 376304, 470380, 517418, 713680, 940760, 1034836, 1293545, 1881520, 2069672, 2587090, 4139344, 5174180, 10348360, 20696720]

約数ペア:

[(1, 20696720), (2, 10348360), (4, 5174180), (5, 4139344), (8, 2587090), (10, 2069672), (11, 1881520), (16, 1293545), (20, 1034836), (22, 940760), (29, 713680), (40, 517418), (44, 470380), (55, 376304), (58, 356840), (80, 258709), (88, 235190), (110, 188152), (116, 178420), (145, 142736), (176, 117595), (220, 94076), (232, 89210), (290, 71368), (319, 64880), (440, 47038), (464, 44605), (580, 35684), (638, 32440), (811, 25520), (880, 23519), (1160, 17842), (1276, 16220), (1595, 12976), (1622, 12760), (2320, 8921), (2552, 8110), (3190, 6488), (3244, 6380), (4055, 5104)]