21245812

素因数分解:

$2^2\times 7^2\times {\mathrm{61}}^1\times {\mathrm{1777}}^1$

素因数の和:1856

約数の個数: 36

約数和(自身を含む): 43984164

約数和(自身を除く): 22738352

約数列:

[1, 2, 4, 7, 14, 28, 49, 61, 98, 122, 196, 244, 427, 854, 1708, 1777, 2989, 3554, 5978, 7108, 11956, 12439, 24878, 49756, 87073, 108397, 174146, 216794, 348292, 433588, 758779, 1517558, 3035116, 5311453, 10622906, 21245812]

約数ペア:

[(1, 21245812), (2, 10622906), (4, 5311453), (7, 3035116), (14, 1517558), (28, 758779), (49, 433588), (61, 348292), (98, 216794), (122, 174146), (196, 108397), (244, 87073), (427, 49756), (854, 24878), (1708, 12439), (1777, 11956), (2989, 7108), (3554, 5978)]