19965904

素因数分解:

$2^4\times 7^1\times {\mathrm{89}}^1\times {\mathrm{2003}}^1$

素因数の和:2107

約数の個数: 40

約数和(自身を含む): 44729280

約数和(自身を除く): 24763376

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 89, 112, 178, 356, 623, 712, 1246, 1424, 2003, 2492, 4006, 4984, 8012, 9968, 14021, 16024, 28042, 32048, 56084, 112168, 178267, 224336, 356534, 713068, 1247869, 1426136, 2495738, 2852272, 4991476, 9982952, 19965904]

約数ペア:

[(1, 19965904), (2, 9982952), (4, 4991476), (7, 2852272), (8, 2495738), (14, 1426136), (16, 1247869), (28, 713068), (56, 356534), (89, 224336), (112, 178267), (178, 112168), (356, 56084), (623, 32048), (712, 28042), (1246, 16024), (1424, 14021), (2003, 9968), (2492, 8012), (4006, 4984)]