21998879

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{107}}^1\times {\mathrm{1277}}^1$

素因数の和:1414

約数の個数: 16

約数和(自身を含む): 26500608

約数和(自身を除く): 4501729

約数列:

[1, 7, 23, 107, 161, 749, 1277, 2461, 8939, 17227, 29371, 136639, 205597, 956473, 3142697, 21998879]

約数ペア:

[(1, 21998879), (7, 3142697), (23, 956473), (107, 205597), (161, 136639), (749, 29371), (1277, 17227), (2461, 8939)]