42390940

素因数分解:

$2^2\times 5^1\times {\mathrm{97}}^1\times {\mathrm{21851}}^1$

素因数の和:21957

約数の個数: 24

約数和(自身を含む): 89942832

約数和(自身を除く): 47551892

約数列:

[1, 2, 4, 5, 10, 20, 97, 194, 388, 485, 970, 1940, 21851, 43702, 87404, 109255, 218510, 437020, 2119547, 4239094, 8478188, 10597735, 21195470, 42390940]

約数ペア:

[(1, 42390940), (2, 21195470), (4, 10597735), (5, 8478188), (10, 4239094), (20, 2119547), (97, 437020), (194, 218510), (388, 109255), (485, 87404), (970, 43702), (1940, 21851)]