21137039

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{277}}^1\times {\mathrm{991}}^1$

素因数の和:1286

約数の個数: 16

約数和(自身を含む): 26474496

約数和(自身を除く): 5337457

約数列:

[1, 7, 11, 77, 277, 991, 1939, 3047, 6937, 10901, 21329, 76307, 274507, 1921549, 3019577, 21137039]

約数ペア:

[(1, 21137039), (7, 3019577), (11, 1921549), (77, 274507), (277, 76307), (991, 21329), (1939, 10901), (3047, 6937)]