638980

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{743}}^1$

素因数の和:795

約数の個数: 24

約数和(自身を含む): 1374912

約数和(自身を除く): 735932

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 743, 860, 1486, 2972, 3715, 7430, 14860, 31949, 63898, 127796, 159745, 319490, 638980]

約数ペア:

[(1, 638980), (2, 319490), (4, 159745), (5, 127796), (10, 63898), (20, 31949), (43, 14860), (86, 7430), (172, 3715), (215, 2972), (430, 1486), (743, 860)]