18381920

素因数分解:

$2^5\times 5^1\times {\mathrm{131}}^1\times {\mathrm{877}}^1$

素因数の和:1023

約数の個数: 48

約数和(自身を含む): 43808688

約数和(自身を除く): 25426768

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 131, 160, 262, 524, 655, 877, 1048, 1310, 1754, 2096, 2620, 3508, 4192, 4385, 5240, 7016, 8770, 10480, 14032, 17540, 20960, 28064, 35080, 70160, 114887, 140320, 229774, 459548, 574435, 919096, 1148870, 1838192, 2297740, 3676384, 4595480, 9190960, 18381920]

約数ペア:

[(1, 18381920), (2, 9190960), (4, 4595480), (5, 3676384), (8, 2297740), (10, 1838192), (16, 1148870), (20, 919096), (32, 574435), (40, 459548), (80, 229774), (131, 140320), (160, 114887), (262, 70160), (524, 35080), (655, 28064), (877, 20960), (1048, 17540), (1310, 14032), (1754, 10480), (2096, 8770), (2620, 7016), (3508, 5240), (4192, 4385)]