21505869

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{31033}}^1$

素因数の和:31057

約数の個数: 24

約数和(自身を含む): 38730432

約数和(自身を除く): 17224563

約数列:

[1, 3, 7, 9, 11, 21, 33, 63, 77, 99, 231, 693, 31033, 93099, 217231, 279297, 341363, 651693, 1024089, 1955079, 2389541, 3072267, 7168623, 21505869]

約数ペア:

[(1, 21505869), (3, 7168623), (7, 3072267), (9, 2389541), (11, 1955079), (21, 1024089), (33, 651693), (63, 341363), (77, 279297), (99, 217231), (231, 93099), (693, 31033)]