21004208

素因数分解:

$2^4\times {\mathrm{647}}^1\times {\mathrm{2029}}^1$

素因数の和:2684

約数の個数: 20

約数和(自身を含む): 40778640

約数和(自身を除く): 19774432

約数列:

[1, 2, 4, 8, 16, 647, 1294, 2029, 2588, 4058, 5176, 8116, 10352, 16232, 32464, 1312763, 2625526, 5251052, 10502104, 21004208]

約数ペア:

[(1, 21004208), (2, 10502104), (4, 5251052), (8, 2625526), (16, 1312763), (647, 32464), (1294, 16232), (2029, 10352), (2588, 8116), (4058, 5176)]