21245955380

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{81715213}}^1$

素因数の和:81715235

約数の個数: 24

約数和(自身を含む): 48048545832

約数和(自身を除く): 26802590452

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 81715213, 163430426, 326860852, 408576065, 817152130, 1062297769, 1634304260, 2124595538, 4249191076, 5311488845, 10622977690, 21245955380]

約数ペア:

[(1, 21245955380), (2, 10622977690), (4, 5311488845), (5, 4249191076), (10, 2124595538), (13, 1634304260), (20, 1062297769), (26, 817152130), (52, 408576065), (65, 326860852), (130, 163430426), (260, 81715213)]