198712720

素因数分解:

$2^4\times 5^1\times {\mathrm{643}}^1\times {\mathrm{3863}}^1$

素因数の和:4519

約数の個数: 40

約数和(自身を含む): 462845376

約数和(自身を除く): 264132656

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 643, 1286, 2572, 3215, 3863, 5144, 6430, 7726, 10288, 12860, 15452, 19315, 25720, 30904, 38630, 51440, 61808, 77260, 154520, 309040, 2483909, 4967818, 9935636, 12419545, 19871272, 24839090, 39742544, 49678180, 99356360, 198712720]

約数ペア:

[(1, 198712720), (2, 99356360), (4, 49678180), (5, 39742544), (8, 24839090), (10, 19871272), (16, 12419545), (20, 9935636), (40, 4967818), (80, 2483909), (643, 309040), (1286, 154520), (2572, 77260), (3215, 61808), (3863, 51440), (5144, 38630), (6430, 30904), (7726, 25720), (10288, 19315), (12860, 15452)]