21131258

素因数分解:

$2^1\times {\mathrm{157}}^1\times {\mathrm{173}}^1\times {\mathrm{389}}^1$

素因数の和:721

約数の個数: 16

約数和(自身を含む): 32165640

約数和(自身を除く): 11034382

約数列:

[1, 2, 157, 173, 314, 346, 389, 778, 27161, 54322, 61073, 67297, 122146, 134594, 10565629, 21131258]

約数ペア:

[(1, 21131258), (2, 10565629), (157, 134594), (173, 122146), (314, 67297), (346, 61073), (389, 54322), (778, 27161)]