18886780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{293}}^2$

素因数の和:606

約数の個数: 36

約数和(自身を含む): 43416072

約数和(自身を除く): 24529292

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 293, 586, 1172, 1465, 2930, 3223, 5860, 6446, 12892, 16115, 32230, 64460, 85849, 171698, 343396, 429245, 858490, 944339, 1716980, 1888678, 3777356, 4721695, 9443390, 18886780]

約数ペア:

[(1, 18886780), (2, 9443390), (4, 4721695), (5, 3777356), (10, 1888678), (11, 1716980), (20, 944339), (22, 858490), (44, 429245), (55, 343396), (110, 171698), (220, 85849), (293, 64460), (586, 32230), (1172, 16115), (1465, 12892), (2930, 6446), (3223, 5860)]