21397680

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{113}}^1\times {\mathrm{263}}^1$

素因数の和:395

約数の個数: 120

約数和(自身を含む): 72772128

約数和(自身を除く): 51374448

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 72, 80, 90, 113, 120, 144, 180, 226, 240, 263, 339, 360, 452, 526, 565, 678, 720, 789, 904, 1017, 1052, 1130, 1315, 1356, 1578, 1695, 1808, 2034, 2104, 2260, 2367, 2630, 2712, 3156, 3390, 3945, 4068, 4208, 4520, 4734, 5085, 5260, 5424, 6312, 6780, 7890, 8136, 9040, 9468, 10170, 10520, 11835, 12624, 13560, 15780, 16272, 18936, 20340, 21040, 23670, 27120, 29719, 31560, 37872, 40680, 47340, 59438, 63120, 81360, 89157, 94680, 118876, 148595, 178314, 189360, 237752, 267471, 297190, 356628, 445785, 475504, 534942, 594380, 713256, 891570, 1069884, 1188760, 1337355, 1426512, 1783140, 2139768, 2377520, 2674710, 3566280, 4279536, 5349420, 7132560, 10698840, 21397680]

約数ペア:

[(1, 21397680), (2, 10698840), (3, 7132560), (4, 5349420), (5, 4279536), (6, 3566280), (8, 2674710), (9, 2377520), (10, 2139768), (12, 1783140), (15, 1426512), (16, 1337355), (18, 1188760), (20, 1069884), (24, 891570), (30, 713256), (36, 594380), (40, 534942), (45, 475504), (48, 445785), (60, 356628), (72, 297190), (80, 267471), (90, 237752), (113, 189360), (120, 178314), (144, 148595), (180, 118876), (226, 94680), (240, 89157), (263, 81360), (339, 63120), (360, 59438), (452, 47340), (526, 40680), (565, 37872), (678, 31560), (720, 29719), (789, 27120), (904, 23670), (1017, 21040), (1052, 20340), (1130, 18936), (1315, 16272), (1356, 15780), (1578, 13560), (1695, 12624), (1808, 11835), (2034, 10520), (2104, 10170), (2260, 9468), (2367, 9040), (2630, 8136), (2712, 7890), (3156, 6780), (3390, 6312), (3945, 5424), (4068, 5260), (4208, 5085), (4520, 4734)]