21045140

素因数分解:

$2^2\times 5^1\times {\mathrm{211}}^1\times {\mathrm{4987}}^1$

素因数の和:5207

約数の個数: 24

約数和(自身を含む): 44413152

約数和(自身を除く): 23368012

約数列:

[1, 2, 4, 5, 10, 20, 211, 422, 844, 1055, 2110, 4220, 4987, 9974, 19948, 24935, 49870, 99740, 1052257, 2104514, 4209028, 5261285, 10522570, 21045140]

約数ペア:

[(1, 21045140), (2, 10522570), (4, 5261285), (5, 4209028), (10, 2104514), (20, 1052257), (211, 99740), (422, 49870), (844, 24935), (1055, 19948), (2110, 9974), (4220, 4987)]