21491704

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{206651}}^1$

素因数の和:206670

約数の個数: 16

約数和(自身を含む): 43396920

約数和(自身を除く): 21905216

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 206651, 413302, 826604, 1653208, 2686463, 5372926, 10745852, 21491704]

約数ペア:

[(1, 21491704), (2, 10745852), (4, 5372926), (8, 2686463), (13, 1653208), (26, 826604), (52, 413302), (104, 206651)]