21215530

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{1493}}^1$

素因数の和:1543

約数の個数: 48

約数和(自身を含む): 45985320

約数和(自身を除く): 24769790

約数列:

[1, 2, 5, 7, 10, 14, 29, 35, 49, 58, 70, 98, 145, 203, 245, 290, 406, 490, 1015, 1421, 1493, 2030, 2842, 2986, 7105, 7465, 10451, 14210, 14930, 20902, 43297, 52255, 73157, 86594, 104510, 146314, 216485, 303079, 365785, 432970, 606158, 731570, 1515395, 2121553, 3030790, 4243106, 10607765, 21215530]

約数ペア:

[(1, 21215530), (2, 10607765), (5, 4243106), (7, 3030790), (10, 2121553), (14, 1515395), (29, 731570), (35, 606158), (49, 432970), (58, 365785), (70, 303079), (98, 216485), (145, 146314), (203, 104510), (245, 86594), (290, 73157), (406, 52255), (490, 43297), (1015, 20902), (1421, 14930), (1493, 14210), (2030, 10451), (2842, 7465), (2986, 7105)]