18784810

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{389}}^1\times {\mathrm{439}}^1$

素因数の和:846

約数の個数: 32

約数和(自身を含む): 37065600

約数和(自身を除く): 18280790

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 389, 439, 778, 878, 1945, 2195, 3890, 4279, 4390, 4829, 8558, 9658, 21395, 24145, 42790, 48290, 170771, 341542, 853855, 1707710, 1878481, 3756962, 9392405, 18784810]

約数ペア:

[(1, 18784810), (2, 9392405), (5, 3756962), (10, 1878481), (11, 1707710), (22, 853855), (55, 341542), (110, 170771), (389, 48290), (439, 42790), (778, 24145), (878, 21395), (1945, 9658), (2195, 8558), (3890, 4829), (4279, 4390)]