21042685

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{281}}^1\times {\mathrm{881}}^1$

素因数の和:1184

約数の個数: 16

約数和(自身を含む): 26862192

約数和(自身を除く): 5819507

約数列:

[1, 5, 17, 85, 281, 881, 1405, 4405, 4777, 14977, 23885, 74885, 247561, 1237805, 4208537, 21042685]

約数ペア:

[(1, 21042685), (5, 4208537), (17, 1237805), (85, 247561), (281, 74885), (881, 23885), (1405, 14977), (4405, 4777)]