21059012

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{404981}}^1$

素因数の和:404998

約数の個数: 12

約数和(自身を含む): 39688236

約数和(自身を除く): 18629224

約数列:

[1, 2, 4, 13, 26, 52, 404981, 809962, 1619924, 5264753, 10529506, 21059012]

約数ペア:

[(1, 21059012), (2, 10529506), (4, 5264753), (13, 1619924), (26, 809962), (52, 404981)]