20990235

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{4649}}^1$

素因数の和:4707

約数の個数: 32

約数和(自身を含む): 39283200

約数和(自身を除く): 18292965

約数列:

[1, 3, 5, 7, 15, 21, 35, 43, 105, 129, 215, 301, 645, 903, 1505, 4515, 4649, 13947, 23245, 32543, 69735, 97629, 162715, 199907, 488145, 599721, 999535, 1399349, 2998605, 4198047, 6996745, 20990235]

約数ペア:

[(1, 20990235), (3, 6996745), (5, 4198047), (7, 2998605), (15, 1399349), (21, 999535), (35, 599721), (43, 488145), (105, 199907), (129, 162715), (215, 97629), (301, 69735), (645, 32543), (903, 23245), (1505, 13947), (4515, 4649)]