820804520

素因数分解:

$2^3\times 5^1\times {\mathrm{1277}}^1\times {\mathrm{16069}}^1$

素因数の和:17357

約数の個数: 32

約数和(自身を含む): 1848371400

約数和(自身を除く): 1027566880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1277, 2554, 5108, 6385, 10216, 12770, 16069, 25540, 32138, 51080, 64276, 80345, 128552, 160690, 321380, 642760, 20520113, 41040226, 82080452, 102600565, 164160904, 205201130, 410402260, 820804520]

約数ペア:

[(1, 820804520), (2, 410402260), (4, 205201130), (5, 164160904), (8, 102600565), (10, 82080452), (20, 41040226), (40, 20520113), (1277, 642760), (2554, 321380), (5108, 160690), (6385, 128552), (10216, 80345), (12770, 64276), (16069, 51080), (25540, 32138)]