21497520

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{479}}^1$

素因数の和:523

約数の個数: 160

約数和(自身を含む): 77137920

約数和(自身を除く): 55640400

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 15, 16, 17, 20, 22, 24, 30, 33, 34, 40, 44, 48, 51, 55, 60, 66, 68, 80, 85, 88, 102, 110, 120, 132, 136, 165, 170, 176, 187, 204, 220, 240, 255, 264, 272, 330, 340, 374, 408, 440, 479, 510, 528, 561, 660, 680, 748, 816, 880, 935, 958, 1020, 1122, 1320, 1360, 1437, 1496, 1870, 1916, 2040, 2244, 2395, 2640, 2805, 2874, 2992, 3740, 3832, 4080, 4488, 4790, 5269, 5610, 5748, 7185, 7480, 7664, 8143, 8976, 9580, 10538, 11220, 11496, 14370, 14960, 15807, 16286, 19160, 21076, 22440, 22992, 24429, 26345, 28740, 31614, 32572, 38320, 40715, 42152, 44880, 48858, 52690, 57480, 63228, 65144, 79035, 81430, 84304, 89573, 97716, 105380, 114960, 122145, 126456, 130288, 158070, 162860, 179146, 195432, 210760, 244290, 252912, 268719, 316140, 325720, 358292, 390864, 421520, 447865, 488580, 537438, 632280, 651440, 716584, 895730, 977160, 1074876, 1264560, 1343595, 1433168, 1791460, 1954320, 2149752, 2687190, 3582920, 4299504, 5374380, 7165840, 10748760, 21497520]

約数ペア:

[(1, 21497520), (2, 10748760), (3, 7165840), (4, 5374380), (5, 4299504), (6, 3582920), (8, 2687190), (10, 2149752), (11, 1954320), (12, 1791460), (15, 1433168), (16, 1343595), (17, 1264560), (20, 1074876), (22, 977160), (24, 895730), (30, 716584), (33, 651440), (34, 632280), (40, 537438), (44, 488580), (48, 447865), (51, 421520), (55, 390864), (60, 358292), (66, 325720), (68, 316140), (80, 268719), (85, 252912), (88, 244290), (102, 210760), (110, 195432), (120, 179146), (132, 162860), (136, 158070), (165, 130288), (170, 126456), (176, 122145), (187, 114960), (204, 105380), (220, 97716), (240, 89573), (255, 84304), (264, 81430), (272, 79035), (330, 65144), (340, 63228), (374, 57480), (408, 52690), (440, 48858), (479, 44880), (510, 42152), (528, 40715), (561, 38320), (660, 32572), (680, 31614), (748, 28740), (816, 26345), (880, 24429), (935, 22992), (958, 22440), (1020, 21076), (1122, 19160), (1320, 16286), (1360, 15807), (1437, 14960), (1496, 14370), (1870, 11496), (1916, 11220), (2040, 10538), (2244, 9580), (2395, 8976), (2640, 8143), (2805, 7664), (2874, 7480), (2992, 7185), (3740, 5748), (3832, 5610), (4080, 5269), (4488, 4790)]