21027780

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{197}}^1\times {\mathrm{593}}^1$

素因数の和:805

約数の個数: 72

約数和(自身を含む): 64216152

約数和(自身を除く): 43188372

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 197, 394, 591, 593, 788, 985, 1182, 1186, 1773, 1779, 1970, 2364, 2372, 2955, 2965, 3546, 3558, 3940, 5337, 5910, 5930, 7092, 7116, 8865, 8895, 10674, 11820, 11860, 17730, 17790, 21348, 26685, 35460, 35580, 53370, 106740, 116821, 233642, 350463, 467284, 584105, 700926, 1051389, 1168210, 1401852, 1752315, 2102778, 2336420, 3504630, 4205556, 5256945, 7009260, 10513890, 21027780]

約数ペア:

[(1, 21027780), (2, 10513890), (3, 7009260), (4, 5256945), (5, 4205556), (6, 3504630), (9, 2336420), (10, 2102778), (12, 1752315), (15, 1401852), (18, 1168210), (20, 1051389), (30, 700926), (36, 584105), (45, 467284), (60, 350463), (90, 233642), (180, 116821), (197, 106740), (394, 53370), (591, 35580), (593, 35460), (788, 26685), (985, 21348), (1182, 17790), (1186, 17730), (1773, 11860), (1779, 11820), (1970, 10674), (2364, 8895), (2372, 8865), (2955, 7116), (2965, 7092), (3546, 5930), (3558, 5910), (3940, 5337)]