21257190

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{251}}^1\times {\mathrm{941}}^1$

素因数の和:1205

約数の個数: 48

約数和(自身を含む): 55547856

約数和(自身を除く): 34290666

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90, 251, 502, 753, 941, 1255, 1506, 1882, 2259, 2510, 2823, 3765, 4518, 4705, 5646, 7530, 8469, 9410, 11295, 14115, 16938, 22590, 28230, 42345, 84690, 236191, 472382, 708573, 1180955, 1417146, 2125719, 2361910, 3542865, 4251438, 7085730, 10628595, 21257190]

約数ペア:

[(1, 21257190), (2, 10628595), (3, 7085730), (5, 4251438), (6, 3542865), (9, 2361910), (10, 2125719), (15, 1417146), (18, 1180955), (30, 708573), (45, 472382), (90, 236191), (251, 84690), (502, 42345), (753, 28230), (941, 22590), (1255, 16938), (1506, 14115), (1882, 11295), (2259, 9410), (2510, 8469), (2823, 7530), (3765, 5646), (4518, 4705)]