20818728

素因数分解:

$2^3\times 3^3\times 7^3\times {\mathrm{281}}^1$

素因数の和:317

約数の個数: 128

約数和(自身を含む): 67680000

約数和(自身を除く): 46861272

約数列:

[1, 2, 3, 4, 6, 7, 8, 9, 12, 14, 18, 21, 24, 27, 28, 36, 42, 49, 54, 56, 63, 72, 84, 98, 108, 126, 147, 168, 189, 196, 216, 252, 281, 294, 343, 378, 392, 441, 504, 562, 588, 686, 756, 843, 882, 1029, 1124, 1176, 1323, 1372, 1512, 1686, 1764, 1967, 2058, 2248, 2529, 2646, 2744, 3087, 3372, 3528, 3934, 4116, 5058, 5292, 5901, 6174, 6744, 7587, 7868, 8232, 9261, 10116, 10584, 11802, 12348, 13769, 15174, 15736, 17703, 18522, 20232, 23604, 24696, 27538, 30348, 35406, 37044, 41307, 47208, 53109, 55076, 60696, 70812, 74088, 82614, 96383, 106218, 110152, 123921, 141624, 165228, 192766, 212436, 247842, 289149, 330456, 371763, 385532, 424872, 495684, 578298, 743526, 771064, 867447, 991368, 1156596, 1487052, 1734894, 2313192, 2602341, 2974104, 3469788, 5204682, 6939576, 10409364, 20818728]

約数ペア:

[(1, 20818728), (2, 10409364), (3, 6939576), (4, 5204682), (6, 3469788), (7, 2974104), (8, 2602341), (9, 2313192), (12, 1734894), (14, 1487052), (18, 1156596), (21, 991368), (24, 867447), (27, 771064), (28, 743526), (36, 578298), (42, 495684), (49, 424872), (54, 385532), (56, 371763), (63, 330456), (72, 289149), (84, 247842), (98, 212436), (108, 192766), (126, 165228), (147, 141624), (168, 123921), (189, 110152), (196, 106218), (216, 96383), (252, 82614), (281, 74088), (294, 70812), (343, 60696), (378, 55076), (392, 53109), (441, 47208), (504, 41307), (562, 37044), (588, 35406), (686, 30348), (756, 27538), (843, 24696), (882, 23604), (1029, 20232), (1124, 18522), (1176, 17703), (1323, 15736), (1372, 15174), (1512, 13769), (1686, 12348), (1764, 11802), (1967, 10584), (2058, 10116), (2248, 9261), (2529, 8232), (2646, 7868), (2744, 7587), (3087, 6744), (3372, 6174), (3528, 5901), (3934, 5292), (4116, 5058)]