81609680

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{139}}^1\times {\mathrm{179}}^1$

素因数の和:372

約数の個数: 80

約数和(自身を含む): 196862400

約数和(自身を除く): 115252720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 139, 164, 179, 205, 278, 328, 358, 410, 556, 656, 695, 716, 820, 895, 1112, 1390, 1432, 1640, 1790, 2224, 2780, 2864, 3280, 3580, 5560, 5699, 7160, 7339, 11120, 11398, 14320, 14678, 22796, 24881, 28495, 29356, 36695, 45592, 49762, 56990, 58712, 73390, 91184, 99524, 113980, 117424, 124405, 146780, 199048, 227960, 248810, 293560, 398096, 455920, 497620, 587120, 995240, 1020121, 1990480, 2040242, 4080484, 5100605, 8160968, 10201210, 16321936, 20402420, 40804840, 81609680]

約数ペア:

[(1, 81609680), (2, 40804840), (4, 20402420), (5, 16321936), (8, 10201210), (10, 8160968), (16, 5100605), (20, 4080484), (40, 2040242), (41, 1990480), (80, 1020121), (82, 995240), (139, 587120), (164, 497620), (179, 455920), (205, 398096), (278, 293560), (328, 248810), (358, 227960), (410, 199048), (556, 146780), (656, 124405), (695, 117424), (716, 113980), (820, 99524), (895, 91184), (1112, 73390), (1390, 58712), (1432, 56990), (1640, 49762), (1790, 45592), (2224, 36695), (2780, 29356), (2864, 28495), (3280, 24881), (3580, 22796), (5560, 14678), (5699, 14320), (7160, 11398), (7339, 11120)]