21020680

素因数分解:

$2^3\times 5^1\times {\mathrm{525517}}^1$

素因数の和:525528

約数の個数: 16

約数和(自身を含む): 47296620

約数和(自身を除く): 26275940

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 525517, 1051034, 2102068, 2627585, 4204136, 5255170, 10510340, 21020680]

約数ペア:

[(1, 21020680), (2, 10510340), (4, 5255170), (5, 4204136), (8, 2627585), (10, 2102068), (20, 1051034), (40, 525517)]