21915280

素因数分解:

$2^4\times 5^1\times {\mathrm{273941}}^1$

素因数の和:273954

約数の個数: 20

約数和(自身を含む): 50953212

約数和(自身を除く): 29037932

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 273941, 547882, 1095764, 1369705, 2191528, 2739410, 4383056, 5478820, 10957640, 21915280]

約数ペア:

[(1, 21915280), (2, 10957640), (4, 5478820), (5, 4383056), (8, 2739410), (10, 2191528), (16, 1369705), (20, 1095764), (40, 547882), (80, 273941)]