81938420

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{178127}}^1$

素因数の和:178159

約数の個数: 24

約数和(自身を含む): 179553024

約数和(自身を除く): 97614604

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 92, 115, 230, 460, 178127, 356254, 712508, 890635, 1781270, 3562540, 4096921, 8193842, 16387684, 20484605, 40969210, 81938420]

約数ペア:

[(1, 81938420), (2, 40969210), (4, 20484605), (5, 16387684), (10, 8193842), (20, 4096921), (23, 3562540), (46, 1781270), (92, 890635), (115, 712508), (230, 356254), (460, 178127)]