19910902

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{10169}}^1$

素因数の和:10271

約数の個数: 16

約数和(自身を含む): 32950800

約数和(自身を除く): 13039898

約数列:

[1, 2, 11, 22, 89, 178, 979, 1958, 10169, 20338, 111859, 223718, 905041, 1810082, 9955451, 19910902]

約数ペア:

[(1, 19910902), (2, 9955451), (11, 1810082), (22, 905041), (89, 223718), (178, 111859), (979, 20338), (1958, 10169)]