78612680

素因数分解:

$2^3\times 5^1\times {\mathrm{97}}^1\times {\mathrm{20261}}^1$

素因数の和:20369

約数の個数: 32

約数和(自身を含む): 178710840

約数和(自身を除く): 100098160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 97, 194, 388, 485, 776, 970, 1940, 3880, 20261, 40522, 81044, 101305, 162088, 202610, 405220, 810440, 1965317, 3930634, 7861268, 9826585, 15722536, 19653170, 39306340, 78612680]

約数ペア:

[(1, 78612680), (2, 39306340), (4, 19653170), (5, 15722536), (8, 9826585), (10, 7861268), (20, 3930634), (40, 1965317), (97, 810440), (194, 405220), (388, 202610), (485, 162088), (776, 101305), (970, 81044), (1940, 40522), (3880, 20261)]