18689140

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{8573}}^1$

素因数の和:8691

約数の個数: 24

約数和(自身を含む): 39611880

約数和(自身を除く): 20922740

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 8573, 17146, 34292, 42865, 85730, 171460, 934457, 1868914, 3737828, 4672285, 9344570, 18689140]

約数ペア:

[(1, 18689140), (2, 9344570), (4, 4672285), (5, 3737828), (10, 1868914), (20, 934457), (109, 171460), (218, 85730), (436, 42865), (545, 34292), (1090, 17146), (2180, 8573)]