18869180

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{199}}^1\times {\mathrm{431}}^1$

素因数の和:650

約数の個数: 48

約数和(自身を含む): 43545600

約数和(自身を除く): 24676420

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 199, 220, 398, 431, 796, 862, 995, 1724, 1990, 2155, 2189, 3980, 4310, 4378, 4741, 8620, 8756, 9482, 10945, 18964, 21890, 23705, 43780, 47410, 85769, 94820, 171538, 343076, 428845, 857690, 943459, 1715380, 1886918, 3773836, 4717295, 9434590, 18869180]

約数ペア:

[(1, 18869180), (2, 9434590), (4, 4717295), (5, 3773836), (10, 1886918), (11, 1715380), (20, 943459), (22, 857690), (44, 428845), (55, 343076), (110, 171538), (199, 94820), (220, 85769), (398, 47410), (431, 43780), (796, 23705), (862, 21890), (995, 18964), (1724, 10945), (1990, 9482), (2155, 8756), (2189, 8620), (3980, 4741), (4310, 4378)]