161357600

素因数分解:

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

素因数の和:2118

約数の個数: 72

約数和(自身を含む): 398013588

約数和(自身を除く): 236655988

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 101, 160, 200, 202, 400, 404, 505, 800, 808, 1010, 1616, 1997, 2020, 2525, 3232, 3994, 4040, 5050, 7988, 8080, 9985, 10100, 15976, 16160, 19970, 20200, 31952, 39940, 40400, 49925, 63904, 79880, 80800, 99850, 159760, 199700, 201697, 319520, 399400, 403394, 798800, 806788, 1008485, 1597600, 1613576, 2016970, 3227152, 4033940, 5042425, 6454304, 8067880, 10084850, 16135760, 20169700, 32271520, 40339400, 80678800, 161357600]

約数ペア:

[(1, 161357600), (2, 80678800), (4, 40339400), (5, 32271520), (8, 20169700), (10, 16135760), (16, 10084850), (20, 8067880), (25, 6454304), (32, 5042425), (40, 4033940), (50, 3227152), (80, 2016970), (100, 1613576), (101, 1597600), (160, 1008485), (200, 806788), (202, 798800), (400, 403394), (404, 399400), (505, 319520), (800, 201697), (808, 199700), (1010, 159760), (1616, 99850), (1997, 80800), (2020, 79880), (2525, 63904), (3232, 49925), (3994, 40400), (4040, 39940), (5050, 31952), (7988, 20200), (8080, 19970), (9985, 16160), (10100, 15976)]