21168

素因数分解:

$2^4\times 3^3\times 7^2$

素因数の和:31

約数の個数: 60

約数和(自身を含む): 70680

約数和(自身を除く): 49512

約数列:

[1, 2, 3, 4, 6, 7, 8, 9, 12, 14, 16, 18, 21, 24, 27, 28, 36, 42, 48, 49, 54, 56, 63, 72, 84, 98, 108, 112, 126, 144, 147, 168, 189, 196, 216, 252, 294, 336, 378, 392, 432, 441, 504, 588, 756, 784, 882, 1008, 1176, 1323, 1512, 1764, 2352, 2646, 3024, 3528, 5292, 7056, 10584, 21168]

約数ペア:

[(1, 21168), (2, 10584), (3, 7056), (4, 5292), (6, 3528), (7, 3024), (8, 2646), (9, 2352), (12, 1764), (14, 1512), (16, 1323), (18, 1176), (21, 1008), (24, 882), (27, 784), (28, 756), (36, 588), (42, 504), (48, 441), (49, 432), (54, 392), (56, 378), (63, 336), (72, 294), (84, 252), (98, 216), (108, 196), (112, 189), (126, 168), (144, 147)]