20554480

素因数分解:

$2^4\times 5^1\times {\mathrm{256931}}^1$

素因数の和:256944

約数の個数: 20

約数和(自身を含む): 47789352

約数和(自身を除く): 27234872

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 256931, 513862, 1027724, 1284655, 2055448, 2569310, 4110896, 5138620, 10277240, 20554480]

約数ペア:

[(1, 20554480), (2, 10277240), (4, 5138620), (5, 4110896), (8, 2569310), (10, 2055448), (16, 1284655), (20, 1027724), (40, 513862), (80, 256931)]