20898647

素因数分解:

$7^3\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{191}}^1$

素因数の和:252

約数の個数: 32

約数和(自身を含む): 27648000

約数和(自身を除く): 6749353

約数列:

[1, 7, 11, 29, 49, 77, 191, 203, 319, 343, 539, 1337, 1421, 2101, 2233, 3773, 5539, 9359, 9947, 14707, 15631, 38773, 60929, 65513, 102949, 109417, 271411, 426503, 720643, 1899877, 2985521, 20898647]

約数ペア:

[(1, 20898647), (7, 2985521), (11, 1899877), (29, 720643), (49, 426503), (77, 271411), (191, 109417), (203, 102949), (319, 65513), (343, 60929), (539, 38773), (1337, 15631), (1421, 14707), (2101, 9947), (2233, 9359), (3773, 5539)]