21840476

素因数分解:

$2^2\times 7^2\times {\mathrm{111431}}^1$

素因数の和:111449

約数の個数: 18

約数和(自身を含む): 44461368

約数和(自身を除く): 22620892

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 196, 111431, 222862, 445724, 780017, 1560034, 3120068, 5460119, 10920238, 21840476]

約数ペア:

[(1, 21840476), (2, 10920238), (4, 5460119), (7, 3120068), (14, 1560034), (28, 780017), (49, 445724), (98, 222862), (196, 111431)]