21778480

素因数分解:

$2^4\times 5^1\times {\mathrm{272231}}^1$

素因数の和:272244

約数の個数: 20

約数和(自身を含む): 50635152

約数和(自身を除く): 28856672

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 272231, 544462, 1088924, 1361155, 2177848, 2722310, 4355696, 5444620, 10889240, 21778480]

約数ペア:

[(1, 21778480), (2, 10889240), (4, 5444620), (5, 4355696), (8, 2722310), (10, 2177848), (16, 1361155), (20, 1088924), (40, 544462), (80, 272231)]