21393155

素因数分解:

$5^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{3011}}^1$

素因数の和:3059

約数の個数: 24

約数和(自身を含む): 30903120

約数和(自身を除く): 9509965

約数列:

[1, 5, 7, 29, 35, 49, 145, 203, 245, 1015, 1421, 3011, 7105, 15055, 21077, 87319, 105385, 147539, 436595, 611233, 737695, 3056165, 4278631, 21393155]

約数ペア:

[(1, 21393155), (5, 4278631), (7, 3056165), (29, 737695), (35, 611233), (49, 436595), (145, 147539), (203, 105385), (245, 87319), (1015, 21077), (1421, 15055), (3011, 7105)]