21390974

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{653}}^1\times {\mathrm{1489}}^1$

素因数の和:2155

約数の個数: 16

約数和(自身を含む): 35080560

約数和(自身を除く): 13689586

約数列:

[1, 2, 11, 22, 653, 1306, 1489, 2978, 7183, 14366, 16379, 32758, 972317, 1944634, 10695487, 21390974]

約数ペア:

[(1, 21390974), (2, 10695487), (11, 1944634), (22, 972317), (653, 32758), (1306, 16379), (1489, 14366), (2978, 7183)]