21959090

素因数分解:

$2^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{75721}}^1$

素因数の和:75757

約数の個数: 16

約数和(自身を含む): 40889880

約数和(自身を除く): 18930790

約数列:

[1, 2, 5, 10, 29, 58, 145, 290, 75721, 151442, 378605, 757210, 2195909, 4391818, 10979545, 21959090]

約数ペア:

[(1, 21959090), (2, 10979545), (5, 4391818), (10, 2195909), (29, 757210), (58, 378605), (145, 151442), (290, 75721)]