21394165

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{47}}^2\times {\mathrm{149}}^1$

素因数の和:261

約数の個数: 24

約数和(自身を含む): 28438200

約数和(自身を除く): 7044035

約数列:

[1, 5, 13, 47, 65, 149, 235, 611, 745, 1937, 2209, 3055, 7003, 9685, 11045, 28717, 35015, 91039, 143585, 329141, 455195, 1645705, 4278833, 21394165]

約数ペア:

[(1, 21394165), (5, 4278833), (13, 1645705), (47, 455195), (65, 329141), (149, 143585), (235, 91039), (611, 35015), (745, 28717), (1937, 11045), (2209, 9685), (3055, 7003)]