161378860

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{74027}}^1$

素因数の和:74145

約数の個数: 24

約数和(自身を含む): 342009360

約数和(自身を除く): 180630500

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 74027, 148054, 296108, 370135, 740270, 1480540, 8068943, 16137886, 32275772, 40344715, 80689430, 161378860]

約数ペア:

[(1, 161378860), (2, 80689430), (4, 40344715), (5, 32275772), (10, 16137886), (20, 8068943), (109, 1480540), (218, 740270), (436, 370135), (545, 296108), (1090, 148054), (2180, 74027)]