19997140

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{9173}}^1$

素因数の和:9291

約数の個数: 24

約数和(自身を含む): 42383880

約数和(自身を除く): 22386740

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 9173, 18346, 36692, 45865, 91730, 183460, 999857, 1999714, 3999428, 4999285, 9998570, 19997140]

約数ペア:

[(1, 19997140), (2, 9998570), (4, 4999285), (5, 3999428), (10, 1999714), (20, 999857), (109, 183460), (218, 91730), (436, 45865), (545, 36692), (1090, 18346), (2180, 9173)]