80678800

素因数分解:

$2^4\times 5^2\times {\mathrm{101}}^1\times {\mathrm{1997}}^1$

素因数の和:2116

約数の個数: 60

約数和(自身を含む): 195847956

約数和(自身を除く): 115169156

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 101, 200, 202, 400, 404, 505, 808, 1010, 1616, 1997, 2020, 2525, 3994, 4040, 5050, 7988, 8080, 9985, 10100, 15976, 19970, 20200, 31952, 39940, 40400, 49925, 79880, 99850, 159760, 199700, 201697, 399400, 403394, 798800, 806788, 1008485, 1613576, 2016970, 3227152, 4033940, 5042425, 8067880, 10084850, 16135760, 20169700, 40339400, 80678800]

約数ペア:

[(1, 80678800), (2, 40339400), (4, 20169700), (5, 16135760), (8, 10084850), (10, 8067880), (16, 5042425), (20, 4033940), (25, 3227152), (40, 2016970), (50, 1613576), (80, 1008485), (100, 806788), (101, 798800), (200, 403394), (202, 399400), (400, 201697), (404, 199700), (505, 159760), (808, 99850), (1010, 79880), (1616, 49925), (1997, 40400), (2020, 39940), (2525, 31952), (3994, 20200), (4040, 19970), (5050, 15976), (7988, 10100), (8080, 9985)]