21206612

素因数分解:

$2^2\times 7^2\times {\mathrm{257}}^1\times {\mathrm{421}}^1$

素因数の和:696

約数の個数: 36

約数和(自身を含む): 43441524

約数和(自身を除く): 22234912

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 196, 257, 421, 514, 842, 1028, 1684, 1799, 2947, 3598, 5894, 7196, 11788, 12593, 20629, 25186, 41258, 50372, 82516, 108197, 216394, 432788, 757379, 1514758, 3029516, 5301653, 10603306, 21206612]

約数ペア:

[(1, 21206612), (2, 10603306), (4, 5301653), (7, 3029516), (14, 1514758), (28, 757379), (49, 432788), (98, 216394), (196, 108197), (257, 82516), (421, 50372), (514, 41258), (842, 25186), (1028, 20629), (1684, 12593), (1799, 11788), (2947, 7196), (3598, 5894)]