81368960

素因数分解:

$2^7\times 5^1\times {\mathrm{127139}}^1$

素因数の和:127158

約数の個数: 32

約数和(自身を含む): 194524200

約数和(自身を除く): 113155240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 127139, 254278, 508556, 635695, 1017112, 1271390, 2034224, 2542780, 4068448, 5085560, 8136896, 10171120, 16273792, 20342240, 40684480, 81368960]

約数ペア:

[(1, 81368960), (2, 40684480), (4, 20342240), (5, 16273792), (8, 10171120), (10, 8136896), (16, 5085560), (20, 4068448), (32, 2542780), (40, 2034224), (64, 1271390), (80, 1017112), (128, 635695), (160, 508556), (320, 254278), (640, 127139)]