21995260

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{157109}}^1$

素因数の和:157125

約数の個数: 24

約数和(自身を含む): 52788960

約数和(自身を除く): 30793700

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 157109, 314218, 628436, 785545, 1099763, 1571090, 2199526, 3142180, 4399052, 5498815, 10997630, 21995260]

約数ペア:

[(1, 21995260), (2, 10997630), (4, 5498815), (5, 4399052), (7, 3142180), (10, 2199526), (14, 1571090), (20, 1099763), (28, 785545), (35, 628436), (70, 314218), (140, 157109)]