20781292

素因数分解:

$2^2\times 7^2\times {\mathrm{229}}^1\times {\mathrm{463}}^1$

素因数の和:710

約数の個数: 36

約数和(自身を含む): 42581280

約数和(自身を除く): 21799988

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 196, 229, 458, 463, 916, 926, 1603, 1852, 3206, 3241, 6412, 6482, 11221, 12964, 22442, 22687, 44884, 45374, 90748, 106027, 212054, 424108, 742189, 1484378, 2968756, 5195323, 10390646, 20781292]

約数ペア:

[(1, 20781292), (2, 10390646), (4, 5195323), (7, 2968756), (14, 1484378), (28, 742189), (49, 424108), (98, 212054), (196, 106027), (229, 90748), (458, 45374), (463, 44884), (916, 22687), (926, 22442), (1603, 12964), (1852, 11221), (3206, 6482), (3241, 6412)]