20557845

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{349}}^1$

素因数の和:395

約数の個数: 96

約数和(自身を含む): 47174400

約数和(自身を除く): 26616555

約数列:

[1, 3, 5, 7, 9, 11, 15, 17, 21, 33, 35, 45, 51, 55, 63, 77, 85, 99, 105, 119, 153, 165, 187, 231, 255, 315, 349, 357, 385, 495, 561, 595, 693, 765, 935, 1047, 1071, 1155, 1309, 1683, 1745, 1785, 2443, 2805, 3141, 3465, 3839, 3927, 5235, 5355, 5933, 6545, 7329, 8415, 11517, 11781, 12215, 15705, 17799, 19195, 19635, 21987, 26873, 29665, 34551, 36645, 41531, 53397, 57585, 58905, 65263, 80619, 88995, 109935, 124593, 134365, 172755, 195789, 207655, 241857, 266985, 326315, 373779, 403095, 456841, 587367, 622965, 978945, 1209285, 1370523, 1868895, 2284205, 2936835, 4111569, 6852615, 20557845]

約数ペア:

[(1, 20557845), (3, 6852615), (5, 4111569), (7, 2936835), (9, 2284205), (11, 1868895), (15, 1370523), (17, 1209285), (21, 978945), (33, 622965), (35, 587367), (45, 456841), (51, 403095), (55, 373779), (63, 326315), (77, 266985), (85, 241857), (99, 207655), (105, 195789), (119, 172755), (153, 134365), (165, 124593), (187, 109935), (231, 88995), (255, 80619), (315, 65263), (349, 58905), (357, 57585), (385, 53397), (495, 41531), (561, 36645), (595, 34551), (693, 29665), (765, 26873), (935, 21987), (1047, 19635), (1071, 19195), (1155, 17799), (1309, 15705), (1683, 12215), (1745, 11781), (1785, 11517), (2443, 8415), (2805, 7329), (3141, 6545), (3465, 5933), (3839, 5355), (3927, 5235)]