21123741

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{31}}^2\times {\mathrm{431}}^1$

素因数の和:513

約数の個数: 24

約数和(自身を含む): 30886272

約数和(自身を除く): 9762531

約数列:

[1, 3, 17, 31, 51, 93, 431, 527, 961, 1293, 1581, 2883, 7327, 13361, 16337, 21981, 40083, 49011, 227137, 414191, 681411, 1242573, 7041247, 21123741]

約数ペア:

[(1, 21123741), (3, 7041247), (17, 1242573), (31, 681411), (51, 414191), (93, 227137), (431, 49011), (527, 40083), (961, 21981), (1293, 16337), (1581, 13361), (2883, 7327)]