18167780

素因数分解:

$2^2\times 5^1\times {\mathrm{409}}^1\times {\mathrm{2221}}^1$

素因数の和:2639

約数の個数: 24

約数和(自身を含む): 38262840

約数和(自身を除く): 20095060

約数列:

[1, 2, 4, 5, 10, 20, 409, 818, 1636, 2045, 2221, 4090, 4442, 8180, 8884, 11105, 22210, 44420, 908389, 1816778, 3633556, 4541945, 9083890, 18167780]

約数ペア:

[(1, 18167780), (2, 9083890), (4, 4541945), (5, 3633556), (10, 1816778), (20, 908389), (409, 44420), (818, 22210), (1636, 11105), (2045, 8884), (2221, 8180), (4090, 4442)]