21240868

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{139}}^1\times {\mathrm{151}}^1$

素因数の和:328

約数の個数: 48

約数和(自身を含む): 42900480

約数和(自身を除く): 21659612

約数列:

[1, 2, 4, 11, 22, 23, 44, 46, 92, 139, 151, 253, 278, 302, 506, 556, 604, 1012, 1529, 1661, 3058, 3197, 3322, 3473, 6116, 6394, 6644, 6946, 12788, 13892, 20989, 35167, 38203, 41978, 70334, 76406, 83956, 140668, 152812, 230879, 461758, 482747, 923516, 965494, 1930988, 5310217, 10620434, 21240868]

約数ペア:

[(1, 21240868), (2, 10620434), (4, 5310217), (11, 1930988), (22, 965494), (23, 923516), (44, 482747), (46, 461758), (92, 230879), (139, 152812), (151, 140668), (253, 83956), (278, 76406), (302, 70334), (506, 41978), (556, 38203), (604, 35167), (1012, 20989), (1529, 13892), (1661, 12788), (3058, 6946), (3197, 6644), (3322, 6394), (3473, 6116)]