21128317

素因数分解:

$7^1\times {\mathrm{73}}^1\times {\mathrm{173}}^1\times {\mathrm{239}}^1$

素因数の和:492

約数の個数: 16

約数和(自身を含む): 24721920

約数和(自身を除く): 3593603

約数列:

[1, 7, 73, 173, 239, 511, 1211, 1673, 12629, 17447, 41347, 88403, 122129, 289429, 3018331, 21128317]

約数ペア:

[(1, 21128317), (7, 3018331), (73, 289429), (173, 122129), (239, 88403), (511, 41347), (1211, 17447), (1673, 12629)]