20728456

素因数分解:

$2^3\times 7^1\times {\mathrm{89}}^1\times {\mathrm{4159}}^1$

素因数の和:4261

約数の個数: 32

約数和(自身を含む): 44928000

約数和(自身を除く): 24199544

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 89, 178, 356, 623, 712, 1246, 2492, 4159, 4984, 8318, 16636, 29113, 33272, 58226, 116452, 232904, 370151, 740302, 1480604, 2591057, 2961208, 5182114, 10364228, 20728456]

約数ペア:

[(1, 20728456), (2, 10364228), (4, 5182114), (7, 2961208), (8, 2591057), (14, 1480604), (28, 740302), (56, 370151), (89, 232904), (178, 116452), (356, 58226), (623, 33272), (712, 29113), (1246, 16636), (2492, 8318), (4159, 4984)]