20407856

素因数分解:

$2^4\times 7^1\times {\mathrm{257}}^1\times {\mathrm{709}}^1$

素因数の和:981

約数の個数: 40

約数和(自身を含む): 45428640

約数和(自身を除く): 25020784

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 112, 257, 514, 709, 1028, 1418, 1799, 2056, 2836, 3598, 4112, 4963, 5672, 7196, 9926, 11344, 14392, 19852, 28784, 39704, 79408, 182213, 364426, 728852, 1275491, 1457704, 2550982, 2915408, 5101964, 10203928, 20407856]

約数ペア:

[(1, 20407856), (2, 10203928), (4, 5101964), (7, 2915408), (8, 2550982), (14, 1457704), (16, 1275491), (28, 728852), (56, 364426), (112, 182213), (257, 79408), (514, 39704), (709, 28784), (1028, 19852), (1418, 14392), (1799, 11344), (2056, 9926), (2836, 7196), (3598, 5672), (4112, 4963)]