21348640

素因数分解:

$2^5\times 5^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{107}}^1$

素因数の和:194

約数の個数: 96

約数和(自身を含む): 53887680

約数和(自身を除く): 32539040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 32, 40, 43, 58, 80, 86, 107, 116, 145, 160, 172, 214, 215, 232, 290, 344, 428, 430, 464, 535, 580, 688, 856, 860, 928, 1070, 1160, 1247, 1376, 1712, 1720, 2140, 2320, 2494, 3103, 3424, 3440, 4280, 4601, 4640, 4988, 6206, 6235, 6880, 8560, 9202, 9976, 12412, 12470, 15515, 17120, 18404, 19952, 23005, 24824, 24940, 31030, 36808, 39904, 46010, 49648, 49880, 62060, 73616, 92020, 99296, 99760, 124120, 133429, 147232, 184040, 199520, 248240, 266858, 368080, 496480, 533716, 667145, 736160, 1067432, 1334290, 2134864, 2668580, 4269728, 5337160, 10674320, 21348640]

約数ペア:

[(1, 21348640), (2, 10674320), (4, 5337160), (5, 4269728), (8, 2668580), (10, 2134864), (16, 1334290), (20, 1067432), (29, 736160), (32, 667145), (40, 533716), (43, 496480), (58, 368080), (80, 266858), (86, 248240), (107, 199520), (116, 184040), (145, 147232), (160, 133429), (172, 124120), (214, 99760), (215, 99296), (232, 92020), (290, 73616), (344, 62060), (428, 49880), (430, 49648), (464, 46010), (535, 39904), (580, 36808), (688, 31030), (856, 24940), (860, 24824), (928, 23005), (1070, 19952), (1160, 18404), (1247, 17120), (1376, 15515), (1712, 12470), (1720, 12412), (2140, 9976), (2320, 9202), (2494, 8560), (3103, 6880), (3424, 6235), (3440, 6206), (4280, 4988), (4601, 4640)]