28140920

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{16361}}^1$

素因数の和:16415

約数の個数: 32

約数和(自身を含む): 64793520

約数和(自身を除く): 36652600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 16361, 32722, 65444, 81805, 130888, 163610, 327220, 654440, 703523, 1407046, 2814092, 3517615, 5628184, 7035230, 14070460, 28140920]

約数ペア:

[(1, 28140920), (2, 14070460), (4, 7035230), (5, 5628184), (8, 3517615), (10, 2814092), (20, 1407046), (40, 703523), (43, 654440), (86, 327220), (172, 163610), (215, 130888), (344, 81805), (430, 65444), (860, 32722), (1720, 16361)]