20998220

素因数分解:

$2^2\times 5^1\times {\mathrm{389}}^1\times {\mathrm{2699}}^1$

素因数の和:3097

約数の個数: 24

約数和(自身を含む): 44226000

約数和(自身を除く): 23227780

約数列:

[1, 2, 4, 5, 10, 20, 389, 778, 1556, 1945, 2699, 3890, 5398, 7780, 10796, 13495, 26990, 53980, 1049911, 2099822, 4199644, 5249555, 10499110, 20998220]

約数ペア:

[(1, 20998220), (2, 10499110), (4, 5249555), (5, 4199644), (10, 2099822), (20, 1049911), (389, 53980), (778, 26990), (1556, 13495), (1945, 10796), (2699, 7780), (3890, 5398)]