21180720

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{113}}^1$

素因数の和:211

約数の個数: 160

約数和(自身を含む): 73281024

約数和(自身を除く): 52100304

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 15, 16, 20, 22, 24, 30, 33, 40, 44, 48, 55, 60, 66, 71, 80, 88, 110, 113, 120, 132, 142, 165, 176, 213, 220, 226, 240, 264, 284, 330, 339, 355, 426, 440, 452, 528, 565, 568, 660, 678, 710, 781, 852, 880, 904, 1065, 1130, 1136, 1243, 1320, 1356, 1420, 1562, 1695, 1704, 1808, 2130, 2260, 2343, 2486, 2640, 2712, 2840, 3124, 3390, 3408, 3729, 3905, 4260, 4520, 4686, 4972, 5424, 5680, 6215, 6248, 6780, 7458, 7810, 8023, 8520, 9040, 9372, 9944, 11715, 12430, 12496, 13560, 14916, 15620, 16046, 17040, 18645, 18744, 19888, 23430, 24069, 24860, 27120, 29832, 31240, 32092, 37290, 37488, 40115, 46860, 48138, 49720, 59664, 62480, 64184, 74580, 80230, 88253, 93720, 96276, 99440, 120345, 128368, 149160, 160460, 176506, 187440, 192552, 240690, 264759, 298320, 320920, 353012, 385104, 441265, 481380, 529518, 641840, 706024, 882530, 962760, 1059036, 1323795, 1412048, 1765060, 1925520, 2118072, 2647590, 3530120, 4236144, 5295180, 7060240, 10590360, 21180720]

約数ペア:

[(1, 21180720), (2, 10590360), (3, 7060240), (4, 5295180), (5, 4236144), (6, 3530120), (8, 2647590), (10, 2118072), (11, 1925520), (12, 1765060), (15, 1412048), (16, 1323795), (20, 1059036), (22, 962760), (24, 882530), (30, 706024), (33, 641840), (40, 529518), (44, 481380), (48, 441265), (55, 385104), (60, 353012), (66, 320920), (71, 298320), (80, 264759), (88, 240690), (110, 192552), (113, 187440), (120, 176506), (132, 160460), (142, 149160), (165, 128368), (176, 120345), (213, 99440), (220, 96276), (226, 93720), (240, 88253), (264, 80230), (284, 74580), (330, 64184), (339, 62480), (355, 59664), (426, 49720), (440, 48138), (452, 46860), (528, 40115), (565, 37488), (568, 37290), (660, 32092), (678, 31240), (710, 29832), (781, 27120), (852, 24860), (880, 24069), (904, 23430), (1065, 19888), (1130, 18744), (1136, 18645), (1243, 17040), (1320, 16046), (1356, 15620), (1420, 14916), (1562, 13560), (1695, 12496), (1704, 12430), (1808, 11715), (2130, 9944), (2260, 9372), (2343, 9040), (2486, 8520), (2640, 8023), (2712, 7810), (2840, 7458), (3124, 6780), (3390, 6248), (3408, 6215), (3729, 5680), (3905, 5424), (4260, 4972), (4520, 4686)]