80040640

素因数分解:

$2^6\times 5^1\times {\mathrm{389}}^1\times {\mathrm{643}}^1$

素因数の和:1049

約数の個数: 56

約数和(自身を含む): 191383920

約数和(自身を除く): 111343280

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 389, 643, 778, 1286, 1556, 1945, 2572, 3112, 3215, 3890, 5144, 6224, 6430, 7780, 10288, 12448, 12860, 15560, 20576, 24896, 25720, 31120, 41152, 51440, 62240, 102880, 124480, 205760, 250127, 500254, 1000508, 1250635, 2001016, 2501270, 4002032, 5002540, 8004064, 10005080, 16008128, 20010160, 40020320, 80040640]

約数ペア:

[(1, 80040640), (2, 40020320), (4, 20010160), (5, 16008128), (8, 10005080), (10, 8004064), (16, 5002540), (20, 4002032), (32, 2501270), (40, 2001016), (64, 1250635), (80, 1000508), (160, 500254), (320, 250127), (389, 205760), (643, 124480), (778, 102880), (1286, 62240), (1556, 51440), (1945, 41152), (2572, 31120), (3112, 25720), (3215, 24896), (3890, 20576), (5144, 15560), (6224, 12860), (6430, 12448), (7780, 10288)]