20813961

素因数分解:

$3^1\times 7^1\times {\mathrm{59}}^1\times {\mathrm{107}}^1\times {\mathrm{157}}^1$

素因数の和:333

約数の個数: 32

約数和(自身を含む): 32762880

約数和(自身を除く): 11948919

約数列:

[1, 3, 7, 21, 59, 107, 157, 177, 321, 413, 471, 749, 1099, 1239, 2247, 3297, 6313, 9263, 16799, 18939, 27789, 44191, 50397, 64841, 117593, 132573, 194523, 352779, 991141, 2973423, 6937987, 20813961]

約数ペア:

[(1, 20813961), (3, 6937987), (7, 2973423), (21, 991141), (59, 352779), (107, 194523), (157, 132573), (177, 117593), (321, 64841), (413, 50397), (471, 44191), (749, 27789), (1099, 18939), (1239, 16799), (2247, 9263), (3297, 6313)]