81558540

素因数分解:

$2^2\times 3^2\times 5^1\times 7^3\times {\mathrm{1321}}^1$

素因数の和:1357

約数の個数: 144

約数和(自身を含む): 288724800

約数和(自身を除く): 207166260

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 49, 60, 63, 70, 84, 90, 98, 105, 126, 140, 147, 180, 196, 210, 245, 252, 294, 315, 343, 420, 441, 490, 588, 630, 686, 735, 882, 980, 1029, 1260, 1321, 1372, 1470, 1715, 1764, 2058, 2205, 2642, 2940, 3087, 3430, 3963, 4116, 4410, 5145, 5284, 6174, 6605, 6860, 7926, 8820, 9247, 10290, 11889, 12348, 13210, 15435, 15852, 18494, 19815, 20580, 23778, 26420, 27741, 30870, 36988, 39630, 46235, 47556, 55482, 59445, 61740, 64729, 79260, 83223, 92470, 110964, 118890, 129458, 138705, 166446, 184940, 194187, 237780, 258916, 277410, 323645, 332892, 388374, 416115, 453103, 554820, 582561, 647290, 776748, 832230, 906206, 970935, 1165122, 1294580, 1359309, 1664460, 1812412, 1941870, 2265515, 2330244, 2718618, 2912805, 3883740, 4077927, 4531030, 5437236, 5825610, 6796545, 8155854, 9062060, 11651220, 13593090, 16311708, 20389635, 27186180, 40779270, 81558540]

約数ペア:

[(1, 81558540), (2, 40779270), (3, 27186180), (4, 20389635), (5, 16311708), (6, 13593090), (7, 11651220), (9, 9062060), (10, 8155854), (12, 6796545), (14, 5825610), (15, 5437236), (18, 4531030), (20, 4077927), (21, 3883740), (28, 2912805), (30, 2718618), (35, 2330244), (36, 2265515), (42, 1941870), (45, 1812412), (49, 1664460), (60, 1359309), (63, 1294580), (70, 1165122), (84, 970935), (90, 906206), (98, 832230), (105, 776748), (126, 647290), (140, 582561), (147, 554820), (180, 453103), (196, 416115), (210, 388374), (245, 332892), (252, 323645), (294, 277410), (315, 258916), (343, 237780), (420, 194187), (441, 184940), (490, 166446), (588, 138705), (630, 129458), (686, 118890), (735, 110964), (882, 92470), (980, 83223), (1029, 79260), (1260, 64729), (1321, 61740), (1372, 59445), (1470, 55482), (1715, 47556), (1764, 46235), (2058, 39630), (2205, 36988), (2642, 30870), (2940, 27741), (3087, 26420), (3430, 23778), (3963, 20580), (4116, 19815), (4410, 18494), (5145, 15852), (5284, 15435), (6174, 13210), (6605, 12348), (6860, 11889), (7926, 10290), (8820, 9247)]