21365812

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{641}}^2$

素因数の和:1299

約数の個数: 18

約数和(自身を含む): 40329254

約数和(自身を除く): 18963442

約数列:

[1, 2, 4, 13, 26, 52, 641, 1282, 2564, 8333, 16666, 33332, 410881, 821762, 1643524, 5341453, 10682906, 21365812]

約数ペア:

[(1, 21365812), (2, 10682906), (4, 5341453), (13, 1643524), (26, 821762), (52, 410881), (641, 33332), (1282, 16666), (2564, 8333)]