20970236

素因数分解:

$2^2\times 7^2\times {\mathrm{97}}^1\times {\mathrm{1103}}^1$

素因数の和:1218

約数の個数: 36

約数和(自身を含む): 43168608

約数和(自身を除く): 22198372

約数列:

[1, 2, 4, 7, 14, 28, 49, 97, 98, 194, 196, 388, 679, 1103, 1358, 2206, 2716, 4412, 4753, 7721, 9506, 15442, 19012, 30884, 54047, 106991, 108094, 213982, 216188, 427964, 748937, 1497874, 2995748, 5242559, 10485118, 20970236]

約数ペア:

[(1, 20970236), (2, 10485118), (4, 5242559), (7, 2995748), (14, 1497874), (28, 748937), (49, 427964), (97, 216188), (98, 213982), (194, 108094), (196, 106991), (388, 54047), (679, 30884), (1103, 19012), (1358, 15442), (2206, 9506), (2716, 7721), (4412, 4753)]