20280477

素因数分解:

$3^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{607}}^1$

素因数の和:697

約数の個数: 32

約数和(自身を含む): 32530432

約数和(自身を除く): 12249955

約数列:

[1, 3, 7, 21, 37, 43, 111, 129, 259, 301, 607, 777, 903, 1591, 1821, 4249, 4773, 11137, 12747, 22459, 26101, 33411, 67377, 78303, 157213, 182707, 471639, 548121, 965737, 2897211, 6760159, 20280477]

約数ペア:

[(1, 20280477), (3, 6760159), (7, 2897211), (21, 965737), (37, 548121), (43, 471639), (111, 182707), (129, 157213), (259, 78303), (301, 67377), (607, 33411), (777, 26101), (903, 22459), (1591, 12747), (1821, 11137), (4249, 4773)]