21217784

素因数分解:

$2^3\times 7^2\times {\mathrm{113}}^1\times {\mathrm{479}}^1$

素因数の和:612

約数の個数: 48

約数和(自身を含む): 46785600

約数和(自身を除く): 25567816

約数列:

[1, 2, 4, 7, 8, 14, 28, 49, 56, 98, 113, 196, 226, 392, 452, 479, 791, 904, 958, 1582, 1916, 3164, 3353, 3832, 5537, 6328, 6706, 11074, 13412, 22148, 23471, 26824, 44296, 46942, 54127, 93884, 108254, 187768, 216508, 378889, 433016, 757778, 1515556, 2652223, 3031112, 5304446, 10608892, 21217784]

約数ペア:

[(1, 21217784), (2, 10608892), (4, 5304446), (7, 3031112), (8, 2652223), (14, 1515556), (28, 757778), (49, 433016), (56, 378889), (98, 216508), (113, 187768), (196, 108254), (226, 93884), (392, 54127), (452, 46942), (479, 44296), (791, 26824), (904, 23471), (958, 22148), (1582, 13412), (1916, 11074), (3164, 6706), (3353, 6328), (3832, 5537)]