21388780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{152777}}^1$

素因数の和:152793

約数の個数: 24

約数和(自身を含む): 51333408

約数和(自身を除く): 29944628

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 152777, 305554, 611108, 763885, 1069439, 1527770, 2138878, 3055540, 4277756, 5347195, 10694390, 21388780]

約数ペア:

[(1, 21388780), (2, 10694390), (4, 5347195), (5, 4277756), (7, 3055540), (10, 2138878), (14, 1527770), (20, 1069439), (28, 763885), (35, 611108), (70, 305554), (140, 152777)]