21047307

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{6967}}^1$

素因数の和:7042

約数の個数: 16

約数和(自身を含む): 30101760

約数和(自身を除く): 9054453

約数列:

[1, 3, 19, 53, 57, 159, 1007, 3021, 6967, 20901, 132373, 369251, 397119, 1107753, 7015769, 21047307]

約数ペア:

[(1, 21047307), (3, 7015769), (19, 1107753), (53, 397119), (57, 369251), (159, 132373), (1007, 20901), (3021, 6967)]