20782755

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{3881}}^1$

素因数の和:3916

約数の個数: 48

約数和(自身を含む): 43602624

約数和(自身を除く): 22819869

約数列:

[1, 3, 5, 7, 9, 15, 17, 21, 35, 45, 51, 63, 85, 105, 119, 153, 255, 315, 357, 595, 765, 1071, 1785, 3881, 5355, 11643, 19405, 27167, 34929, 58215, 65977, 81501, 135835, 174645, 197931, 244503, 329885, 407505, 461839, 593793, 989655, 1222515, 1385517, 2309195, 2968965, 4156551, 6927585, 20782755]

約数ペア:

[(1, 20782755), (3, 6927585), (5, 4156551), (7, 2968965), (9, 2309195), (15, 1385517), (17, 1222515), (21, 989655), (35, 593793), (45, 461839), (51, 407505), (63, 329885), (85, 244503), (105, 197931), (119, 174645), (153, 135835), (255, 81501), (315, 65977), (357, 58215), (595, 34929), (765, 27167), (1071, 19405), (1785, 11643), (3881, 5355)]