21138480

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{157}}^1$

素因数の和:204

約数の個数: 240

約数和(自身を含む): 82521504

約数和(自身を除く): 61383024

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 15, 16, 17, 18, 20, 22, 24, 30, 33, 34, 36, 40, 44, 45, 48, 51, 55, 60, 66, 68, 72, 80, 85, 88, 90, 99, 102, 110, 120, 132, 136, 144, 153, 157, 165, 170, 176, 180, 187, 198, 204, 220, 240, 255, 264, 272, 306, 314, 330, 340, 360, 374, 396, 408, 440, 471, 495, 510, 528, 561, 612, 628, 660, 680, 720, 748, 765, 785, 792, 816, 880, 935, 942, 990, 1020, 1122, 1224, 1256, 1320, 1360, 1413, 1496, 1530, 1570, 1584, 1683, 1727, 1870, 1884, 1980, 2040, 2244, 2355, 2448, 2512, 2640, 2669, 2805, 2826, 2992, 3060, 3140, 3366, 3454, 3740, 3768, 3960, 4080, 4488, 4710, 5181, 5338, 5610, 5652, 6120, 6280, 6732, 6908, 7065, 7480, 7536, 7920, 8007, 8415, 8635, 8976, 9420, 10362, 10676, 11220, 11304, 12240, 12560, 13345, 13464, 13816, 14130, 14960, 15543, 16014, 16830, 17270, 18840, 20724, 21352, 22440, 22608, 24021, 25905, 26690, 26928, 27632, 28260, 29359, 31086, 32028, 33660, 34540, 37680, 40035, 41448, 42704, 44880, 48042, 51810, 53380, 56520, 58718, 62172, 64056, 67320, 69080, 77715, 80070, 82896, 88077, 96084, 103620, 106760, 113040, 117436, 120105, 124344, 128112, 134640, 138160, 146795, 155430, 160140, 176154, 192168, 207240, 213520, 234872, 240210, 248688, 264231, 293590, 310860, 320280, 352308, 384336, 414480, 440385, 469744, 480420, 528462, 587180, 621720, 640560, 704616, 880770, 960840, 1056924, 1174360, 1243440, 1321155, 1409232, 1761540, 1921680, 2113848, 2348720, 2642310, 3523080, 4227696, 5284620, 7046160, 10569240, 21138480]

約数ペア:

[(1, 21138480), (2, 10569240), (3, 7046160), (4, 5284620), (5, 4227696), (6, 3523080), (8, 2642310), (9, 2348720), (10, 2113848), (11, 1921680), (12, 1761540), (15, 1409232), (16, 1321155), (17, 1243440), (18, 1174360), (20, 1056924), (22, 960840), (24, 880770), (30, 704616), (33, 640560), (34, 621720), (36, 587180), (40, 528462), (44, 480420), (45, 469744), (48, 440385), (51, 414480), (55, 384336), (60, 352308), (66, 320280), (68, 310860), (72, 293590), (80, 264231), (85, 248688), (88, 240210), (90, 234872), (99, 213520), (102, 207240), (110, 192168), (120, 176154), (132, 160140), (136, 155430), (144, 146795), (153, 138160), (157, 134640), (165, 128112), (170, 124344), (176, 120105), (180, 117436), (187, 113040), (198, 106760), (204, 103620), (220, 96084), (240, 88077), (255, 82896), (264, 80070), (272, 77715), (306, 69080), (314, 67320), (330, 64056), (340, 62172), (360, 58718), (374, 56520), (396, 53380), (408, 51810), (440, 48042), (471, 44880), (495, 42704), (510, 41448), (528, 40035), (561, 37680), (612, 34540), (628, 33660), (660, 32028), (680, 31086), (720, 29359), (748, 28260), (765, 27632), (785, 26928), (792, 26690), (816, 25905), (880, 24021), (935, 22608), (942, 22440), (990, 21352), (1020, 20724), (1122, 18840), (1224, 17270), (1256, 16830), (1320, 16014), (1360, 15543), (1413, 14960), (1496, 14130), (1530, 13816), (1570, 13464), (1584, 13345), (1683, 12560), (1727, 12240), (1870, 11304), (1884, 11220), (1980, 10676), (2040, 10362), (2244, 9420), (2355, 8976), (2448, 8635), (2512, 8415), (2640, 8007), (2669, 7920), (2805, 7536), (2826, 7480), (2992, 7065), (3060, 6908), (3140, 6732), (3366, 6280), (3454, 6120), (3740, 5652), (3768, 5610), (3960, 5338), (4080, 5181), (4488, 4710)]