21243720

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{179}}^1$

素因数の和:259

約数の個数: 128

約数和(自身を含む): 68428800

約数和(自身を除く): 47185080

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 23, 24, 30, 40, 43, 46, 60, 69, 86, 92, 115, 120, 129, 138, 172, 179, 184, 215, 230, 258, 276, 344, 345, 358, 430, 460, 516, 537, 552, 645, 690, 716, 860, 895, 920, 989, 1032, 1074, 1290, 1380, 1432, 1720, 1790, 1978, 2148, 2580, 2685, 2760, 2967, 3580, 3956, 4117, 4296, 4945, 5160, 5370, 5934, 7160, 7697, 7912, 8234, 9890, 10740, 11868, 12351, 14835, 15394, 16468, 19780, 20585, 21480, 23091, 23736, 24702, 29670, 30788, 32936, 38485, 39560, 41170, 46182, 49404, 59340, 61576, 61755, 76970, 82340, 92364, 98808, 115455, 118680, 123510, 153940, 164680, 177031, 184728, 230910, 247020, 307880, 354062, 461820, 494040, 531093, 708124, 885155, 923640, 1062186, 1416248, 1770310, 2124372, 2655465, 3540620, 4248744, 5310930, 7081240, 10621860, 21243720]

約数ペア:

[(1, 21243720), (2, 10621860), (3, 7081240), (4, 5310930), (5, 4248744), (6, 3540620), (8, 2655465), (10, 2124372), (12, 1770310), (15, 1416248), (20, 1062186), (23, 923640), (24, 885155), (30, 708124), (40, 531093), (43, 494040), (46, 461820), (60, 354062), (69, 307880), (86, 247020), (92, 230910), (115, 184728), (120, 177031), (129, 164680), (138, 153940), (172, 123510), (179, 118680), (184, 115455), (215, 98808), (230, 92364), (258, 82340), (276, 76970), (344, 61755), (345, 61576), (358, 59340), (430, 49404), (460, 46182), (516, 41170), (537, 39560), (552, 38485), (645, 32936), (690, 30788), (716, 29670), (860, 24702), (895, 23736), (920, 23091), (989, 21480), (1032, 20585), (1074, 19780), (1290, 16468), (1380, 15394), (1432, 14835), (1720, 12351), (1790, 11868), (1978, 10740), (2148, 9890), (2580, 8234), (2685, 7912), (2760, 7697), (2967, 7160), (3580, 5934), (3956, 5370), (4117, 5160), (4296, 4945)]