21176470

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{353}}^1\times {\mathrm{857}}^1$

素因数の和:1224

約数の個数: 32

約数和(自身を含む): 43737408

約数和(自身を除く): 22560938

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 353, 706, 857, 1714, 1765, 2471, 3530, 4285, 4942, 5999, 8570, 11998, 12355, 24710, 29995, 59990, 302521, 605042, 1512605, 2117647, 3025210, 4235294, 10588235, 21176470]

約数ペア:

[(1, 21176470), (2, 10588235), (5, 4235294), (7, 3025210), (10, 2117647), (14, 1512605), (35, 605042), (70, 302521), (353, 59990), (706, 29995), (857, 24710), (1714, 12355), (1765, 11998), (2471, 8570), (3530, 5999), (4285, 4942)]