81617740

素因数分解:

$2^2\times 5^1\times {\mathrm{97}}^1\times {\mathrm{42071}}^1$

素因数の和:42177

約数の個数: 24

約数和(自身を含む): 173168352

約数和(自身を除く): 91550612

約数列:

[1, 2, 4, 5, 10, 20, 97, 194, 388, 485, 970, 1940, 42071, 84142, 168284, 210355, 420710, 841420, 4080887, 8161774, 16323548, 20404435, 40808870, 81617740]

約数ペア:

[(1, 81617740), (2, 40808870), (4, 20404435), (5, 16323548), (10, 8161774), (20, 4080887), (97, 841420), (194, 420710), (388, 210355), (485, 168284), (970, 84142), (1940, 42071)]