21285872

素因数分解:

$2^4\times {\mathrm{643}}^1\times {\mathrm{2069}}^1$

素因数の和:2720

約数の個数: 20

約数和(自身を含む): 41325480

約数和(自身を除く): 20039608

約数列:

[1, 2, 4, 8, 16, 643, 1286, 2069, 2572, 4138, 5144, 8276, 10288, 16552, 33104, 1330367, 2660734, 5321468, 10642936, 21285872]

約数ペア:

[(1, 21285872), (2, 10642936), (4, 5321468), (8, 2660734), (16, 1330367), (643, 33104), (1286, 16552), (2069, 10288), (2572, 8276), (4138, 5144)]