21261891

素因数分解:

$3^1\times 7^1\times {\mathrm{499}}^1\times {\mathrm{2029}}^1$

素因数の和:2538

約数の個数: 16

約数和(自身を含む): 32480000

約数和(自身を除く): 11218109

約数列:

[1, 3, 7, 21, 499, 1497, 2029, 3493, 6087, 10479, 14203, 42609, 1012471, 3037413, 7087297, 21261891]

約数ペア:

[(1, 21261891), (3, 7087297), (7, 3037413), (21, 1012471), (499, 42609), (1497, 14203), (2029, 10479), (3493, 6087)]