19881256

素因数分解:

$2^3\times {\mathrm{641}}^1\times {\mathrm{3877}}^1$

素因数の和:4524

約数の個数: 16

約数和(自身を含む): 37345140

約数和(自身を除く): 17463884

約数列:

[1, 2, 4, 8, 641, 1282, 2564, 3877, 5128, 7754, 15508, 31016, 2485157, 4970314, 9940628, 19881256]

約数ペア:

[(1, 19881256), (2, 9940628), (4, 4970314), (8, 2485157), (641, 31016), (1282, 15508), (2564, 7754), (3877, 5128)]