21309806

素因数分解:

$2^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{12791}}^1$

素因数の和:12824

約数の個数: 24

約数和(自身を含む): 39373776

約数和(自身を除く): 18063970

約数列:

[1, 2, 7, 14, 17, 34, 49, 98, 119, 238, 833, 1666, 12791, 25582, 89537, 179074, 217447, 434894, 626759, 1253518, 1522129, 3044258, 10654903, 21309806]

約数ペア:

[(1, 21309806), (2, 10654903), (7, 3044258), (14, 1522129), (17, 1253518), (34, 626759), (49, 434894), (98, 217447), (119, 179074), (238, 89537), (833, 25582), (1666, 12791)]