21057513

素因数分解:

$3^1\times {\mathrm{59}}^1\times {\mathrm{271}}^1\times {\mathrm{439}}^1$

素因数の和:772

約数の個数: 16

約数和(自身を含む): 28723200

約数和(自身を除く): 7665687

約数列:

[1, 3, 59, 177, 271, 439, 813, 1317, 15989, 25901, 47967, 77703, 118969, 356907, 7019171, 21057513]

約数ペア:

[(1, 21057513), (3, 7019171), (59, 356907), (177, 118969), (271, 77703), (439, 47967), (813, 25901), (1317, 15989)]