20904128

素因数分解:

$2^6\times 7^1\times {\mathrm{29}}^1\times {\mathrm{1609}}^1$

素因数の和:1657

約数の個数: 56

約数和(自身を含む): 49072800

約数和(自身を除く): 28168672

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 29, 32, 56, 58, 64, 112, 116, 203, 224, 232, 406, 448, 464, 812, 928, 1609, 1624, 1856, 3218, 3248, 6436, 6496, 11263, 12872, 12992, 22526, 25744, 45052, 46661, 51488, 90104, 93322, 102976, 180208, 186644, 326627, 360416, 373288, 653254, 720832, 746576, 1306508, 1493152, 2613016, 2986304, 5226032, 10452064, 20904128]

約数ペア:

[(1, 20904128), (2, 10452064), (4, 5226032), (7, 2986304), (8, 2613016), (14, 1493152), (16, 1306508), (28, 746576), (29, 720832), (32, 653254), (56, 373288), (58, 360416), (64, 326627), (112, 186644), (116, 180208), (203, 102976), (224, 93322), (232, 90104), (406, 51488), (448, 46661), (464, 45052), (812, 25744), (928, 22526), (1609, 12992), (1624, 12872), (1856, 11263), (3218, 6496), (3248, 6436)]