21387105

素因数分解:

$3^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{9319}}^1$

素因数の和:9350

約数の個数: 32

約数和(自身を含む): 40262400

約数和(自身を除く): 18875295

約数列:

[1, 3, 5, 9, 15, 17, 27, 45, 51, 85, 135, 153, 255, 459, 765, 2295, 9319, 27957, 46595, 83871, 139785, 158423, 251613, 419355, 475269, 792115, 1258065, 1425807, 2376345, 4277421, 7129035, 21387105]

約数ペア:

[(1, 21387105), (3, 7129035), (5, 4277421), (9, 2376345), (15, 1425807), (17, 1258065), (27, 792115), (45, 475269), (51, 419355), (85, 251613), (135, 158423), (153, 139785), (255, 83871), (459, 46595), (765, 27957), (2295, 9319)]