20871333

素因数分解:

$3^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{5431}}^1$

素因数の和:5505

約数の個数: 24

約数和(自身を含む): 35025536

約数和(自身を除く): 14154203

約数列:

[1, 3, 7, 9, 21, 61, 63, 183, 427, 549, 1281, 3843, 5431, 16293, 38017, 48879, 114051, 331291, 342153, 993873, 2319037, 2981619, 6957111, 20871333]

約数ペア:

[(1, 20871333), (3, 6957111), (7, 2981619), (9, 2319037), (21, 993873), (61, 342153), (63, 331291), (183, 114051), (427, 48879), (549, 38017), (1281, 16293), (3843, 5431)]