7998920

素因数分解:

$2^3\times 5^1\times {\mathrm{311}}^1\times {\mathrm{643}}^1$

素因数の和:965

約数の個数: 32

約数和(自身を含む): 18083520

約数和(自身を除く): 10084600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 311, 622, 643, 1244, 1286, 1555, 2488, 2572, 3110, 3215, 5144, 6220, 6430, 12440, 12860, 25720, 199973, 399946, 799892, 999865, 1599784, 1999730, 3999460, 7998920]

約数ペア:

[(1, 7998920), (2, 3999460), (4, 1999730), (5, 1599784), (8, 999865), (10, 799892), (20, 399946), (40, 199973), (311, 25720), (622, 12860), (643, 12440), (1244, 6430), (1286, 6220), (1555, 5144), (2488, 3215), (2572, 3110)]