21042399

素因数分解:

$3^1\times 7^1\times {\mathrm{131}}^1\times {\mathrm{7649}}^1$

素因数の和:7790

約数の個数: 16

約数和(自身を含む): 32313600

約数和(自身を除く): 11271201

約数列:

[1, 3, 7, 21, 131, 393, 917, 2751, 7649, 22947, 53543, 160629, 1002019, 3006057, 7014133, 21042399]

約数ペア:

[(1, 21042399), (3, 7014133), (7, 3006057), (21, 1002019), (131, 160629), (393, 53543), (917, 22947), (2751, 7649)]