21385620

素因数分解:

$2^2\times 3^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{307}}^1$

素因数の和:371

約数の個数: 120

約数和(自身を含む): 68871264

約数和(自身を除く): 47485644

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 43, 45, 54, 60, 81, 86, 90, 108, 129, 135, 162, 172, 180, 215, 258, 270, 307, 324, 387, 405, 430, 516, 540, 614, 645, 774, 810, 860, 921, 1161, 1228, 1290, 1535, 1548, 1620, 1842, 1935, 2322, 2580, 2763, 3070, 3483, 3684, 3870, 4605, 4644, 5526, 5805, 6140, 6966, 7740, 8289, 9210, 11052, 11610, 13201, 13815, 13932, 16578, 17415, 18420, 23220, 24867, 26402, 27630, 33156, 34830, 39603, 41445, 49734, 52804, 55260, 66005, 69660, 79206, 82890, 99468, 118809, 124335, 132010, 158412, 165780, 198015, 237618, 248670, 264020, 356427, 396030, 475236, 497340, 594045, 712854, 792060, 1069281, 1188090, 1425708, 1782135, 2138562, 2376180, 3564270, 4277124, 5346405, 7128540, 10692810, 21385620]

約数ペア:

[(1, 21385620), (2, 10692810), (3, 7128540), (4, 5346405), (5, 4277124), (6, 3564270), (9, 2376180), (10, 2138562), (12, 1782135), (15, 1425708), (18, 1188090), (20, 1069281), (27, 792060), (30, 712854), (36, 594045), (43, 497340), (45, 475236), (54, 396030), (60, 356427), (81, 264020), (86, 248670), (90, 237618), (108, 198015), (129, 165780), (135, 158412), (162, 132010), (172, 124335), (180, 118809), (215, 99468), (258, 82890), (270, 79206), (307, 69660), (324, 66005), (387, 55260), (405, 52804), (430, 49734), (516, 41445), (540, 39603), (614, 34830), (645, 33156), (774, 27630), (810, 26402), (860, 24867), (921, 23220), (1161, 18420), (1228, 17415), (1290, 16578), (1535, 13932), (1548, 13815), (1620, 13201), (1842, 11610), (1935, 11052), (2322, 9210), (2580, 8289), (2763, 7740), (3070, 6966), (3483, 6140), (3684, 5805), (3870, 5526), (4605, 4644)]