21997030

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{311}}^1\times {\mathrm{643}}^1$

素因数の和:972

約数の個数: 32

約数和(自身を含む): 43400448

約数和(自身を除く): 21403418

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 311, 622, 643, 1286, 1555, 3110, 3215, 3421, 6430, 6842, 7073, 14146, 17105, 34210, 35365, 70730, 199973, 399946, 999865, 1999730, 2199703, 4399406, 10998515, 21997030]

約数ペア:

[(1, 21997030), (2, 10998515), (5, 4399406), (10, 2199703), (11, 1999730), (22, 999865), (55, 399946), (110, 199973), (311, 70730), (622, 35365), (643, 34210), (1286, 17105), (1555, 14146), (3110, 7073), (3215, 6842), (3421, 6430)]