21057765

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{67}}^1\times {\mathrm{911}}^1$

素因数の和:1009

約数の個数: 32

約数和(自身を含む): 35721216

約数和(自身を除く): 14663451

約数列:

[1, 3, 5, 15, 23, 67, 69, 115, 201, 335, 345, 911, 1005, 1541, 2733, 4555, 4623, 7705, 13665, 20953, 23115, 61037, 62859, 104765, 183111, 305185, 314295, 915555, 1403851, 4211553, 7019255, 21057765]

約数ペア:

[(1, 21057765), (3, 7019255), (5, 4211553), (15, 1403851), (23, 915555), (67, 314295), (69, 305185), (115, 183111), (201, 104765), (335, 62859), (345, 61037), (911, 23115), (1005, 20953), (1541, 13665), (2733, 7705), (4555, 4623)]