81408880

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{3929}}^1$

素因数の和:3986

約数の個数: 80

約数和(自身を含む): 222217920

約数和(自身を除く): 140809040

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 37, 40, 56, 70, 74, 80, 112, 140, 148, 185, 259, 280, 296, 370, 518, 560, 592, 740, 1036, 1295, 1480, 2072, 2590, 2960, 3929, 4144, 5180, 7858, 10360, 15716, 19645, 20720, 27503, 31432, 39290, 55006, 62864, 78580, 110012, 137515, 145373, 157160, 220024, 275030, 290746, 314320, 440048, 550060, 581492, 726865, 1017611, 1100120, 1162984, 1453730, 2035222, 2200240, 2325968, 2907460, 4070444, 5088055, 5814920, 8140888, 10176110, 11629840, 16281776, 20352220, 40704440, 81408880]

約数ペア:

[(1, 81408880), (2, 40704440), (4, 20352220), (5, 16281776), (7, 11629840), (8, 10176110), (10, 8140888), (14, 5814920), (16, 5088055), (20, 4070444), (28, 2907460), (35, 2325968), (37, 2200240), (40, 2035222), (56, 1453730), (70, 1162984), (74, 1100120), (80, 1017611), (112, 726865), (140, 581492), (148, 550060), (185, 440048), (259, 314320), (280, 290746), (296, 275030), (370, 220024), (518, 157160), (560, 145373), (592, 137515), (740, 110012), (1036, 78580), (1295, 62864), (1480, 55006), (2072, 39290), (2590, 31432), (2960, 27503), (3929, 20720), (4144, 19645), (5180, 15716), (7858, 10360)]