21409143

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{53657}}^1$

素因数の和:53686

約数の個数: 16

約数和(自身を含む): 34341120

約数和(自身を除く): 12931977

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 53657, 160971, 375599, 1019483, 1126797, 3058449, 7136381, 21409143]

約数ペア:

[(1, 21409143), (3, 7136381), (7, 3058449), (19, 1126797), (21, 1019483), (57, 375599), (133, 160971), (399, 53657)]