21281552

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{78241}}^1$

素因数の和:78266

約数の個数: 20

約数和(自身を含む): 43659036

約数和(自身を除く): 22377484

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 78241, 156482, 312964, 625928, 1251856, 1330097, 2660194, 5320388, 10640776, 21281552]

約数ペア:

[(1, 21281552), (2, 10640776), (4, 5320388), (8, 2660194), (16, 1330097), (17, 1251856), (34, 625928), (68, 312964), (136, 156482), (272, 78241)]