780440

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{179}}^1$

素因数の和:299

約数の個数: 32

約数和(自身を含む): 1782000

約数和(自身を除く): 1001560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 179, 218, 358, 436, 545, 716, 872, 895, 1090, 1432, 1790, 2180, 3580, 4360, 7160, 19511, 39022, 78044, 97555, 156088, 195110, 390220, 780440]

約数ペア:

[(1, 780440), (2, 390220), (4, 195110), (5, 156088), (8, 97555), (10, 78044), (20, 39022), (40, 19511), (109, 7160), (179, 4360), (218, 3580), (358, 2180), (436, 1790), (545, 1432), (716, 1090), (872, 895)]