661566160

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{101}}^1\times {\mathrm{1997}}^1$

素因数の和:2152

約数の個数: 80

約数和(自身を含む): 1592054352

約数和(自身を除く): 930488192

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 101, 164, 202, 205, 328, 404, 410, 505, 656, 808, 820, 1010, 1616, 1640, 1997, 2020, 3280, 3994, 4040, 4141, 7988, 8080, 8282, 9985, 15976, 16564, 19970, 20705, 31952, 33128, 39940, 41410, 66256, 79880, 81877, 82820, 159760, 163754, 165640, 201697, 327508, 331280, 403394, 409385, 655016, 806788, 818770, 1008485, 1310032, 1613576, 1637540, 2016970, 3227152, 3275080, 4033940, 6550160, 8067880, 8269577, 16135760, 16539154, 33078308, 41347885, 66156616, 82695770, 132313232, 165391540, 330783080, 661566160]

約数ペア:

[(1, 661566160), (2, 330783080), (4, 165391540), (5, 132313232), (8, 82695770), (10, 66156616), (16, 41347885), (20, 33078308), (40, 16539154), (41, 16135760), (80, 8269577), (82, 8067880), (101, 6550160), (164, 4033940), (202, 3275080), (205, 3227152), (328, 2016970), (404, 1637540), (410, 1613576), (505, 1310032), (656, 1008485), (808, 818770), (820, 806788), (1010, 655016), (1616, 409385), (1640, 403394), (1997, 331280), (2020, 327508), (3280, 201697), (3994, 165640), (4040, 163754), (4141, 159760), (7988, 82820), (8080, 81877), (8282, 79880), (9985, 66256), (15976, 41410), (16564, 39940), (19970, 33128), (20705, 31952)]