1639856870

素因数分解:

$2^1\times 5^1\times {\mathrm{409}}^1\times {\mathrm{400943}}^1$

素因数の和:401359

約数の個数: 16

約数和(自身を含む): 2958966720

約数和(自身を除く): 1319109850

約数列:

[1, 2, 5, 10, 409, 818, 2045, 4090, 400943, 801886, 2004715, 4009430, 163985687, 327971374, 819928435, 1639856870]

約数ペア:

[(1, 1639856870), (2, 819928435), (5, 327971374), (10, 163985687), (409, 4009430), (818, 2004715), (2045, 801886), (4090, 400943)]