21105954

素因数分解:

$2^1\times 3^3\times {\mathrm{390851}}^1$

素因数の和:390862

約数の個数: 16

約数和(自身を含む): 46902240

約数和(自身を除く): 25796286

約数列:

[1, 2, 3, 6, 9, 18, 27, 54, 390851, 781702, 1172553, 2345106, 3517659, 7035318, 10552977, 21105954]

約数ペア:

[(1, 21105954), (2, 10552977), (3, 7035318), (6, 3517659), (9, 2345106), (18, 1172553), (27, 781702), (54, 390851)]