21058388

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{404969}}^1$

素因数の和:404986

約数の個数: 12

約数和(自身を含む): 39687060

約数和(自身を除く): 18628672

約数列:

[1, 2, 4, 13, 26, 52, 404969, 809938, 1619876, 5264597, 10529194, 21058388]

約数ペア:

[(1, 21058388), (2, 10529194), (4, 5264597), (13, 1619876), (26, 809938), (52, 404969)]