21991320

素因数分解:

$2^3\times 3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{127}}^1$

素因数の和:194

約数の個数: 192

約数和(自身を含む): 79672320

約数和(自身を除く): 57681000

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 13, 15, 18, 20, 24, 26, 30, 36, 37, 39, 40, 45, 52, 60, 65, 72, 74, 78, 90, 104, 111, 117, 120, 127, 130, 148, 156, 180, 185, 195, 222, 234, 254, 260, 296, 312, 333, 360, 370, 381, 390, 444, 468, 481, 508, 520, 555, 585, 635, 666, 740, 762, 780, 888, 936, 962, 1016, 1110, 1143, 1170, 1270, 1332, 1443, 1480, 1524, 1560, 1651, 1665, 1905, 1924, 2220, 2286, 2340, 2405, 2540, 2664, 2886, 3048, 3302, 3330, 3810, 3848, 4329, 4440, 4572, 4680, 4699, 4810, 4953, 5080, 5715, 5772, 6604, 6660, 7215, 7620, 8255, 8658, 9144, 9398, 9620, 9906, 11430, 11544, 13208, 13320, 14097, 14430, 14859, 15240, 16510, 17316, 18796, 19240, 19812, 21645, 22860, 23495, 24765, 28194, 28860, 29718, 33020, 34632, 37592, 39624, 42291, 43290, 45720, 46990, 49530, 56388, 57720, 59436, 61087, 66040, 70485, 74295, 84582, 86580, 93980, 99060, 112776, 118872, 122174, 140970, 148590, 169164, 173160, 183261, 187960, 198120, 211455, 244348, 281940, 297180, 305435, 338328, 366522, 422910, 488696, 549783, 563880, 594360, 610870, 733044, 845820, 916305, 1099566, 1221740, 1466088, 1691640, 1832610, 2199132, 2443480, 2748915, 3665220, 4398264, 5497830, 7330440, 10995660, 21991320]

約数ペア:

[(1, 21991320), (2, 10995660), (3, 7330440), (4, 5497830), (5, 4398264), (6, 3665220), (8, 2748915), (9, 2443480), (10, 2199132), (12, 1832610), (13, 1691640), (15, 1466088), (18, 1221740), (20, 1099566), (24, 916305), (26, 845820), (30, 733044), (36, 610870), (37, 594360), (39, 563880), (40, 549783), (45, 488696), (52, 422910), (60, 366522), (65, 338328), (72, 305435), (74, 297180), (78, 281940), (90, 244348), (104, 211455), (111, 198120), (117, 187960), (120, 183261), (127, 173160), (130, 169164), (148, 148590), (156, 140970), (180, 122174), (185, 118872), (195, 112776), (222, 99060), (234, 93980), (254, 86580), (260, 84582), (296, 74295), (312, 70485), (333, 66040), (360, 61087), (370, 59436), (381, 57720), (390, 56388), (444, 49530), (468, 46990), (481, 45720), (508, 43290), (520, 42291), (555, 39624), (585, 37592), (635, 34632), (666, 33020), (740, 29718), (762, 28860), (780, 28194), (888, 24765), (936, 23495), (962, 22860), (1016, 21645), (1110, 19812), (1143, 19240), (1170, 18796), (1270, 17316), (1332, 16510), (1443, 15240), (1480, 14859), (1524, 14430), (1560, 14097), (1651, 13320), (1665, 13208), (1905, 11544), (1924, 11430), (2220, 9906), (2286, 9620), (2340, 9398), (2405, 9144), (2540, 8658), (2664, 8255), (2886, 7620), (3048, 7215), (3302, 6660), (3330, 6604), (3810, 5772), (3848, 5715), (4329, 5080), (4440, 4953), (4572, 4810), (4680, 4699)]