20487159

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1$

素因数の和:125

約数の個数: 96

約数和(自身を含む): 40974336

約数和(自身を除く): 20487177

約数列:

[1, 3, 7, 9, 11, 17, 21, 33, 37, 47, 51, 63, 77, 99, 111, 119, 141, 153, 187, 231, 259, 329, 333, 357, 407, 423, 517, 561, 629, 693, 777, 799, 987, 1071, 1221, 1309, 1551, 1683, 1739, 1887, 2331, 2397, 2849, 2961, 3619, 3663, 3927, 4403, 4653, 5217, 5593, 5661, 6919, 7191, 8547, 8789, 10857, 11781, 12173, 13209, 15651, 16779, 19129, 20757, 25641, 26367, 29563, 32571, 36519, 39627, 48433, 50337, 57387, 61523, 62271, 79101, 88689, 109557, 133903, 145299, 172161, 184569, 206941, 266067, 325193, 401709, 435897, 553707, 620823, 975579, 1205127, 1862469, 2276351, 2926737, 6829053, 20487159]

約数ペア:

[(1, 20487159), (3, 6829053), (7, 2926737), (9, 2276351), (11, 1862469), (17, 1205127), (21, 975579), (33, 620823), (37, 553707), (47, 435897), (51, 401709), (63, 325193), (77, 266067), (99, 206941), (111, 184569), (119, 172161), (141, 145299), (153, 133903), (187, 109557), (231, 88689), (259, 79101), (329, 62271), (333, 61523), (357, 57387), (407, 50337), (423, 48433), (517, 39627), (561, 36519), (629, 32571), (693, 29563), (777, 26367), (799, 25641), (987, 20757), (1071, 19129), (1221, 16779), (1309, 15651), (1551, 13209), (1683, 12173), (1739, 11781), (1887, 10857), (2331, 8789), (2397, 8547), (2849, 7191), (2961, 6919), (3619, 5661), (3663, 5593), (3927, 5217), (4403, 4653)]