21780306

素因数分解:

$2^1\times 3^3\times {\mathrm{403339}}^1$

素因数の和:403350

約数の個数: 16

約数和(自身を含む): 48400800

約数和(自身を除く): 26620494

約数列:

[1, 2, 3, 6, 9, 18, 27, 54, 403339, 806678, 1210017, 2420034, 3630051, 7260102, 10890153, 21780306]

約数ペア:

[(1, 21780306), (2, 10890153), (3, 7260102), (6, 3630051), (9, 2420034), (18, 1210017), (27, 806678), (54, 403339)]