21370540

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{9803}}^1$

素因数の和:9921

約数の個数: 24

約数和(自身を含む): 45294480

約数和(自身を除く): 23923940

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 9803, 19606, 39212, 49015, 98030, 196060, 1068527, 2137054, 4274108, 5342635, 10685270, 21370540]

約数ペア:

[(1, 21370540), (2, 10685270), (4, 5342635), (5, 4274108), (10, 2137054), (20, 1068527), (109, 196060), (218, 98030), (436, 49015), (545, 39212), (1090, 19606), (2180, 9803)]