20815641

素因数分解:

$3^2\times 7^3\times {\mathrm{11}}^1\times {\mathrm{613}}^1$

素因数の和:651

約数の個数: 48

約数和(自身を含む): 38313600

約数和(自身を除く): 17497959

約数列:

[1, 3, 7, 9, 11, 21, 33, 49, 63, 77, 99, 147, 231, 343, 441, 539, 613, 693, 1029, 1617, 1839, 3087, 3773, 4291, 4851, 5517, 6743, 11319, 12873, 20229, 30037, 33957, 38619, 47201, 60687, 90111, 141603, 210259, 270333, 330407, 424809, 630777, 991221, 1892331, 2312849, 2973663, 6938547, 20815641]

約数ペア:

[(1, 20815641), (3, 6938547), (7, 2973663), (9, 2312849), (11, 1892331), (21, 991221), (33, 630777), (49, 424809), (63, 330407), (77, 270333), (99, 210259), (147, 141603), (231, 90111), (343, 60687), (441, 47201), (539, 38619), (613, 33957), (693, 30037), (1029, 20229), (1617, 12873), (1839, 11319), (3087, 6743), (3773, 5517), (4291, 4851)]