20128221

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{293}}^1\times {\mathrm{449}}^1$

素因数の和:765

約数の個数: 24

約数和(自身を含む): 30958200

約数和(自身を除く): 10829979

約数列:

[1, 3, 9, 17, 51, 153, 293, 449, 879, 1347, 2637, 4041, 4981, 7633, 14943, 22899, 44829, 68697, 131557, 394671, 1184013, 2236469, 6709407, 20128221]

約数ペア:

[(1, 20128221), (3, 6709407), (9, 2236469), (17, 1184013), (51, 394671), (153, 131557), (293, 68697), (449, 44829), (879, 22899), (1347, 14943), (2637, 7633), (4041, 4981)]