21180776

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{155741}}^1$

素因数の和:155764

約数の個数: 16

約数和(自身を含む): 42050340

約数和(自身を除く): 20869564

約数列:

[1, 2, 4, 8, 17, 34, 68, 136, 155741, 311482, 622964, 1245928, 2647597, 5295194, 10590388, 21180776]

約数ペア:

[(1, 21180776), (2, 10590388), (4, 5295194), (8, 2647597), (17, 1245928), (34, 622964), (68, 311482), (136, 155741)]