21980553

素因数分解:

$3^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{28289}}^1$

素因数の和:28336

約数の個数: 16

約数和(自身を含む): 34400640

約数和(自身を除く): 12420087

約数列:

[1, 3, 7, 21, 37, 111, 259, 777, 28289, 84867, 198023, 594069, 1046693, 3140079, 7326851, 21980553]

約数ペア:

[(1, 21980553), (3, 7326851), (7, 3140079), (21, 1046693), (37, 594069), (111, 198023), (259, 84867), (777, 28289)]