21208904

素因数分解:

$2^3\times {\mathrm{53}}^1\times {\mathrm{50021}}^1$

素因数の和:50080

約数の個数: 16

約数和(自身を含む): 40517820

約数和(自身を除く): 19308916

約数列:

[1, 2, 4, 8, 53, 106, 212, 424, 50021, 100042, 200084, 400168, 2651113, 5302226, 10604452, 21208904]

約数ペア:

[(1, 21208904), (2, 10604452), (4, 5302226), (8, 2651113), (53, 400168), (106, 200084), (212, 100042), (424, 50021)]