21000306608

素因数分解:

$2^4\times {\mathrm{317}}^1\times {\mathrm{4140439}}^1$

素因数の和:4140764

約数の個数: 20

約数和(自身を含む): 40816457520

約数和(自身を除く): 19816150912

約数列:

[1, 2, 4, 8, 16, 317, 634, 1268, 2536, 5072, 4140439, 8280878, 16561756, 33123512, 66247024, 1312519163, 2625038326, 5250076652, 10500153304, 21000306608]

約数ペア:

[(1, 21000306608), (2, 10500153304), (4, 5250076652), (8, 2625038326), (16, 1312519163), (317, 66247024), (634, 33123512), (1268, 16561756), (2536, 8280878), (5072, 4140439)]