21890640

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{197}}^1\times {\mathrm{463}}^1$

素因数の和:676

約数の個数: 80

約数和(自身を含む): 68352768

約数和(自身を除く): 46462128

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 197, 240, 394, 463, 591, 788, 926, 985, 1182, 1389, 1576, 1852, 1970, 2315, 2364, 2778, 2955, 3152, 3704, 3940, 4630, 4728, 5556, 5910, 6945, 7408, 7880, 9260, 9456, 11112, 11820, 13890, 15760, 18520, 22224, 23640, 27780, 37040, 47280, 55560, 91211, 111120, 182422, 273633, 364844, 456055, 547266, 729688, 912110, 1094532, 1368165, 1459376, 1824220, 2189064, 2736330, 3648440, 4378128, 5472660, 7296880, 10945320, 21890640]

約数ペア:

[(1, 21890640), (2, 10945320), (3, 7296880), (4, 5472660), (5, 4378128), (6, 3648440), (8, 2736330), (10, 2189064), (12, 1824220), (15, 1459376), (16, 1368165), (20, 1094532), (24, 912110), (30, 729688), (40, 547266), (48, 456055), (60, 364844), (80, 273633), (120, 182422), (197, 111120), (240, 91211), (394, 55560), (463, 47280), (591, 37040), (788, 27780), (926, 23640), (985, 22224), (1182, 18520), (1389, 15760), (1576, 13890), (1852, 11820), (1970, 11112), (2315, 9456), (2364, 9260), (2778, 7880), (2955, 7408), (3152, 6945), (3704, 5910), (3940, 5556), (4630, 4728)]