21205291203

素因数分解:

$3^2\times {\mathrm{677}}^1\times {\mathrm{3480271}}^1$

素因数の和:3480954

約数の個数: 12

約数和(自身を含む): 30675117408

約数和(自身を除く): 9469826205

約数列:

[1, 3, 9, 677, 2031, 6093, 3480271, 10440813, 31322439, 2356143467, 7068430401, 21205291203]

約数ペア:

[(1, 21205291203), (3, 7068430401), (9, 2356143467), (677, 31322439), (2031, 10440813), (6093, 3480271)]