21028317

素因数分解:

$3^1\times {\mathrm{47}}^1\times {\mathrm{293}}^1\times {\mathrm{509}}^1$

素因数の和:852

約数の個数: 16

約数和(自身を含む): 28788480

約数和(自身を除く): 7760163

約数列:

[1, 3, 47, 141, 293, 509, 879, 1527, 13771, 23923, 41313, 71769, 149137, 447411, 7009439, 21028317]

約数ペア:

[(1, 21028317), (3, 7009439), (47, 447411), (141, 149137), (293, 71769), (509, 41313), (879, 23923), (1527, 13771)]