390220

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{179}}^1$

素因数の和:297

約数の個数: 24

約数和(自身を含む): 831600

約数和(自身を除く): 441380

約数列:

[1, 2, 4, 5, 10, 20, 109, 179, 218, 358, 436, 545, 716, 895, 1090, 1790, 2180, 3580, 19511, 39022, 78044, 97555, 195110, 390220]

約数ペア:

[(1, 390220), (2, 195110), (4, 97555), (5, 78044), (10, 39022), (20, 19511), (109, 3580), (179, 2180), (218, 1790), (358, 1090), (436, 895), (545, 716)]