19997300

素因数分解:

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

素因数の和:968

約数の個数: 36

約数和(自身を含む): 43601376

約数和(自身を除く): 23604076

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 311, 622, 643, 1244, 1286, 1555, 2572, 3110, 3215, 6220, 6430, 7775, 12860, 15550, 16075, 31100, 32150, 64300, 199973, 399946, 799892, 999865, 1999730, 3999460, 4999325, 9998650, 19997300]

約数ペア:

[(1, 19997300), (2, 9998650), (4, 4999325), (5, 3999460), (10, 1999730), (20, 999865), (25, 799892), (50, 399946), (100, 199973), (311, 64300), (622, 32150), (643, 31100), (1244, 16075), (1286, 15550), (1555, 12860), (2572, 7775), (3110, 6430), (3215, 6220)]