20204415

素因数分解:

$3^2\times 5^1\times 7^4\times {\mathrm{11}}^1\times {\mathrm{17}}^1$

素因数の和:67

約数の個数: 120

約数和(自身を含む): 47191248

約数和(自身を除く): 26986833

約数列:

[1, 3, 5, 7, 9, 11, 15, 17, 21, 33, 35, 45, 49, 51, 55, 63, 77, 85, 99, 105, 119, 147, 153, 165, 187, 231, 245, 255, 315, 343, 357, 385, 441, 495, 539, 561, 595, 693, 735, 765, 833, 935, 1029, 1071, 1155, 1309, 1617, 1683, 1715, 1785, 2205, 2401, 2499, 2695, 2805, 3087, 3465, 3773, 3927, 4165, 4851, 5145, 5355, 5831, 6545, 7203, 7497, 8085, 8415, 9163, 11319, 11781, 12005, 12495, 15435, 17493, 18865, 19635, 21609, 24255, 26411, 27489, 29155, 33957, 36015, 37485, 40817, 45815, 52479, 56595, 58905, 64141, 79233, 82467, 87465, 108045, 122451, 132055, 137445, 169785, 192423, 204085, 237699, 262395, 320705, 367353, 396165, 412335, 448987, 577269, 612255, 962115, 1188495, 1346961, 1836765, 2244935, 2886345, 4040883, 6734805, 20204415]

約数ペア:

[(1, 20204415), (3, 6734805), (5, 4040883), (7, 2886345), (9, 2244935), (11, 1836765), (15, 1346961), (17, 1188495), (21, 962115), (33, 612255), (35, 577269), (45, 448987), (49, 412335), (51, 396165), (55, 367353), (63, 320705), (77, 262395), (85, 237699), (99, 204085), (105, 192423), (119, 169785), (147, 137445), (153, 132055), (165, 122451), (187, 108045), (231, 87465), (245, 82467), (255, 79233), (315, 64141), (343, 58905), (357, 56595), (385, 52479), (441, 45815), (495, 40817), (539, 37485), (561, 36015), (595, 33957), (693, 29155), (735, 27489), (765, 26411), (833, 24255), (935, 21609), (1029, 19635), (1071, 18865), (1155, 17493), (1309, 15435), (1617, 12495), (1683, 12005), (1715, 11781), (1785, 11319), (2205, 9163), (2401, 8415), (2499, 8085), (2695, 7497), (2805, 7203), (3087, 6545), (3465, 5831), (3773, 5355), (3927, 5145), (4165, 4851)]