20209825

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{157}}^1\times {\mathrm{271}}^1$

素因数の和:457

約数の個数: 24

約数和(自身を含む): 26645120

約数和(自身を除く): 6435295

約数列:

[1, 5, 19, 25, 95, 157, 271, 475, 785, 1355, 2983, 3925, 5149, 6775, 14915, 25745, 42547, 74575, 128725, 212735, 808393, 1063675, 4041965, 20209825]

約数ペア:

[(1, 20209825), (5, 4041965), (19, 1063675), (25, 808393), (95, 212735), (157, 128725), (271, 74575), (475, 42547), (785, 25745), (1355, 14915), (2983, 6775), (3925, 5149)]