20921768

素因数分解:

$2^3\times 7^1\times {\mathrm{47}}^1\times {\mathrm{7949}}^1$

素因数の和:8009

約数の個数: 32

約数和(自身を含む): 45792000

約数和(自身を除く): 24870232

約数列:

[1, 2, 4, 7, 8, 14, 28, 47, 56, 94, 188, 329, 376, 658, 1316, 2632, 7949, 15898, 31796, 55643, 63592, 111286, 222572, 373603, 445144, 747206, 1494412, 2615221, 2988824, 5230442, 10460884, 20921768]

約数ペア:

[(1, 20921768), (2, 10460884), (4, 5230442), (7, 2988824), (8, 2615221), (14, 1494412), (28, 747206), (47, 445144), (56, 373603), (94, 222572), (188, 111286), (329, 63592), (376, 55643), (658, 31796), (1316, 15898), (2632, 7949)]