19434440

素因数分解:

$2^3\times 5^1\times {\mathrm{389}}^1\times {\mathrm{1249}}^1$

素因数の和:1649

約数の個数: 32

約数和(自身を含む): 43875000

約数和(自身を除く): 24440560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 389, 778, 1249, 1556, 1945, 2498, 3112, 3890, 4996, 6245, 7780, 9992, 12490, 15560, 24980, 49960, 485861, 971722, 1943444, 2429305, 3886888, 4858610, 9717220, 19434440]

約数ペア:

[(1, 19434440), (2, 9717220), (4, 4858610), (5, 3886888), (8, 2429305), (10, 1943444), (20, 971722), (40, 485861), (389, 49960), (778, 24980), (1249, 15560), (1556, 12490), (1945, 9992), (2498, 7780), (3112, 6245), (3890, 4996)]