21685972

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{181}}^1\times {\mathrm{389}}^1$

素因数の和:592

約数の個数: 48

約数和(自身を含む): 47698560

約数和(自身を除く): 26012588

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 77, 154, 181, 308, 362, 389, 724, 778, 1267, 1556, 1991, 2534, 2723, 3982, 4279, 5068, 5446, 7964, 8558, 10892, 13937, 17116, 27874, 29953, 55748, 59906, 70409, 119812, 140818, 281636, 492863, 774499, 985726, 1548998, 1971452, 3097996, 5421493, 10842986, 21685972]

約数ペア:

[(1, 21685972), (2, 10842986), (4, 5421493), (7, 3097996), (11, 1971452), (14, 1548998), (22, 985726), (28, 774499), (44, 492863), (77, 281636), (154, 140818), (181, 119812), (308, 70409), (362, 59906), (389, 55748), (724, 29953), (778, 27874), (1267, 17116), (1556, 13937), (1991, 10892), (2534, 8558), (2723, 7964), (3982, 5446), (4279, 5068)]