81976860

素因数分解:

$2^2\times 3^4\times 5^1\times 7^1\times {\mathrm{7229}}^1$

素因数の和:7257

約数の個数: 120

約数和(自身を含む): 293942880

約数和(自身を除く): 211966020

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 27, 28, 30, 35, 36, 42, 45, 54, 60, 63, 70, 81, 84, 90, 105, 108, 126, 135, 140, 162, 180, 189, 210, 252, 270, 315, 324, 378, 405, 420, 540, 567, 630, 756, 810, 945, 1134, 1260, 1620, 1890, 2268, 2835, 3780, 5670, 7229, 11340, 14458, 21687, 28916, 36145, 43374, 50603, 65061, 72290, 86748, 101206, 108435, 130122, 144580, 151809, 195183, 202412, 216870, 253015, 260244, 303618, 325305, 390366, 433740, 455427, 506030, 585549, 607236, 650610, 759045, 780732, 910854, 975915, 1012060, 1171098, 1301220, 1366281, 1518090, 1821708, 1951830, 2277135, 2342196, 2732562, 2927745, 3036180, 3903660, 4098843, 4554270, 5465124, 5855490, 6831405, 8197686, 9108540, 11710980, 13662810, 16395372, 20494215, 27325620, 40988430, 81976860]

約数ペア:

[(1, 81976860), (2, 40988430), (3, 27325620), (4, 20494215), (5, 16395372), (6, 13662810), (7, 11710980), (9, 9108540), (10, 8197686), (12, 6831405), (14, 5855490), (15, 5465124), (18, 4554270), (20, 4098843), (21, 3903660), (27, 3036180), (28, 2927745), (30, 2732562), (35, 2342196), (36, 2277135), (42, 1951830), (45, 1821708), (54, 1518090), (60, 1366281), (63, 1301220), (70, 1171098), (81, 1012060), (84, 975915), (90, 910854), (105, 780732), (108, 759045), (126, 650610), (135, 607236), (140, 585549), (162, 506030), (180, 455427), (189, 433740), (210, 390366), (252, 325305), (270, 303618), (315, 260244), (324, 253015), (378, 216870), (405, 202412), (420, 195183), (540, 151809), (567, 144580), (630, 130122), (756, 108435), (810, 101206), (945, 86748), (1134, 72290), (1260, 65061), (1620, 50603), (1890, 43374), (2268, 36145), (2835, 28916), (3780, 21687), (5670, 14458), (7229, 11340)]