21581679

素因数分解:

$3^1\times 7^1\times {\mathrm{439}}^1\times {\mathrm{2341}}^1$

素因数の和:2790

約数の個数: 16

約数和(自身を含む): 32975360

約数和(自身を除く): 11393681

約数列:

[1, 3, 7, 21, 439, 1317, 2341, 3073, 7023, 9219, 16387, 49161, 1027699, 3083097, 7193893, 21581679]

約数ペア:

[(1, 21581679), (3, 7193893), (7, 3083097), (21, 1027699), (439, 49161), (1317, 16387), (2341, 9219), (3073, 7023)]