18921880

素因数分解:

$2^3\times 5^1\times {\mathrm{107}}^1\times {\mathrm{4421}}^1$

素因数の和:4539

約数の個数: 32

約数和(自身を含む): 42981840

約数和(自身を除く): 24059960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 107, 214, 428, 535, 856, 1070, 2140, 4280, 4421, 8842, 17684, 22105, 35368, 44210, 88420, 176840, 473047, 946094, 1892188, 2365235, 3784376, 4730470, 9460940, 18921880]

約数ペア:

[(1, 18921880), (2, 9460940), (4, 4730470), (5, 3784376), (8, 2365235), (10, 1892188), (20, 946094), (40, 473047), (107, 176840), (214, 88420), (428, 44210), (535, 35368), (856, 22105), (1070, 17684), (2140, 8842), (4280, 4421)]