81602920

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{291439}}^1$

素因数の和:291457

約数の個数: 32

約数和(自身を含む): 209836800

約数和(自身を除く): 128233880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 291439, 582878, 1165756, 1457195, 2040073, 2331512, 2914390, 4080146, 5828780, 8160292, 10200365, 11657560, 16320584, 20400730, 40801460, 81602920]

約数ペア:

[(1, 81602920), (2, 40801460), (4, 20400730), (5, 16320584), (7, 11657560), (8, 10200365), (10, 8160292), (14, 5828780), (20, 4080146), (28, 2914390), (35, 2331512), (40, 2040073), (56, 1457195), (70, 1165756), (140, 582878), (280, 291439)]