21122787

素因数分解:

$3^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{21401}}^1$

素因数の和:21458

約数の個数: 16

約数和(自身を含む): 32873472

約数和(自身を除く): 11750685

約数列:

[1, 3, 7, 21, 47, 141, 329, 987, 21401, 64203, 149807, 449421, 1005847, 3017541, 7040929, 21122787]

約数ペア:

[(1, 21122787), (3, 7040929), (7, 3017541), (21, 1005847), (47, 449421), (141, 149807), (329, 64203), (987, 21401)]