20407905

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{103}}^1$

素因数の和:175

約数の個数: 96

約数和(自身を含む): 44388864

約数和(自身を除く): 23980959

約数列:

[1, 3, 5, 7, 9, 15, 17, 21, 35, 37, 45, 51, 63, 85, 103, 105, 111, 119, 153, 185, 255, 259, 309, 315, 333, 357, 515, 555, 595, 629, 721, 765, 777, 927, 1071, 1295, 1545, 1665, 1751, 1785, 1887, 2163, 2331, 3145, 3605, 3811, 3885, 4403, 4635, 5253, 5355, 5661, 6489, 8755, 9435, 10815, 11433, 11655, 12257, 13209, 15759, 19055, 22015, 26265, 26677, 28305, 32445, 34299, 36771, 39627, 57165, 61285, 64787, 66045, 78795, 80031, 110313, 133385, 171495, 183855, 194361, 198135, 240093, 323935, 400155, 453509, 551565, 583083, 971805, 1200465, 1360527, 2267545, 2915415, 4081581, 6802635, 20407905]

約数ペア:

[(1, 20407905), (3, 6802635), (5, 4081581), (7, 2915415), (9, 2267545), (15, 1360527), (17, 1200465), (21, 971805), (35, 583083), (37, 551565), (45, 453509), (51, 400155), (63, 323935), (85, 240093), (103, 198135), (105, 194361), (111, 183855), (119, 171495), (153, 133385), (185, 110313), (255, 80031), (259, 78795), (309, 66045), (315, 64787), (333, 61285), (357, 57165), (515, 39627), (555, 36771), (595, 34299), (629, 32445), (721, 28305), (765, 26677), (777, 26265), (927, 22015), (1071, 19055), (1295, 15759), (1545, 13209), (1665, 12257), (1751, 11655), (1785, 11433), (1887, 10815), (2163, 9435), (2331, 8755), (3145, 6489), (3605, 5661), (3811, 5355), (3885, 5253), (4403, 4635)]