21328688

素因数分解:

$2^4\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{1069}}^1$

素因数の和:1149

約数の個数: 40

約数和(自身を含む): 43784400

約数和(自身を除く): 22455712

約数列:

[1, 2, 4, 8, 16, 29, 43, 58, 86, 116, 172, 232, 344, 464, 688, 1069, 1247, 2138, 2494, 4276, 4988, 8552, 9976, 17104, 19952, 31001, 45967, 62002, 91934, 124004, 183868, 248008, 367736, 496016, 735472, 1333043, 2666086, 5332172, 10664344, 21328688]

約数ペア:

[(1, 21328688), (2, 10664344), (4, 5332172), (8, 2666086), (16, 1333043), (29, 735472), (43, 496016), (58, 367736), (86, 248008), (116, 183868), (172, 124004), (232, 91934), (344, 62002), (464, 45967), (688, 31001), (1069, 19952), (1247, 17104), (2138, 9976), (2494, 8552), (4276, 4988)]