21293555

素因数分解:

$5^1\times {\mathrm{41}}^1\times {\mathrm{241}}^1\times {\mathrm{431}}^1$

素因数の和:718

約数の個数: 16

約数和(自身を含む): 26345088

約数和(自身を除く): 5051533

約数列:

[1, 5, 41, 205, 241, 431, 1205, 2155, 9881, 17671, 49405, 88355, 103871, 519355, 4258711, 21293555]

約数ペア:

[(1, 21293555), (5, 4258711), (41, 519355), (205, 103871), (241, 88355), (431, 49405), (1205, 17671), (2155, 9881)]