21308048

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{30971}}^1$

素因数の和:31022

約数の個数: 20

約数和(自身を含む): 42245808

約数和(自身を除く): 20937760

約数列:

[1, 2, 4, 8, 16, 43, 86, 172, 344, 688, 30971, 61942, 123884, 247768, 495536, 1331753, 2663506, 5327012, 10654024, 21308048]

約数ペア:

[(1, 21308048), (2, 10654024), (4, 5327012), (8, 2663506), (16, 1331753), (43, 495536), (86, 247768), (172, 123884), (344, 61942), (688, 30971)]