641690

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{89}}^1\times {\mathrm{103}}^1$

素因数の和:206

約数の個数: 32

約数和(自身を含む): 1347840

約数和(自身を除く): 706150

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 89, 103, 178, 206, 445, 515, 623, 721, 890, 1030, 1246, 1442, 3115, 3605, 6230, 7210, 9167, 18334, 45835, 64169, 91670, 128338, 320845, 641690]

約数ペア:

[(1, 641690), (2, 320845), (5, 128338), (7, 91670), (10, 64169), (14, 45835), (35, 18334), (70, 9167), (89, 7210), (103, 6230), (178, 3605), (206, 3115), (445, 1442), (515, 1246), (623, 1030), (721, 890)]