21619257

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{433}}^1$

素因数の和:553

約数の個数: 32

約数和(自身を含む): 33747840

約数和(自身を除く): 12128583

約数列:

[1, 3, 11, 17, 33, 51, 89, 187, 267, 433, 561, 979, 1299, 1513, 2937, 4539, 4763, 7361, 14289, 16643, 22083, 38537, 49929, 80971, 115611, 242913, 423907, 655129, 1271721, 1965387, 7206419, 21619257]

約数ペア:

[(1, 21619257), (3, 7206419), (11, 1965387), (17, 1271721), (33, 655129), (51, 423907), (89, 242913), (187, 115611), (267, 80971), (433, 49929), (561, 38537), (979, 22083), (1299, 16643), (1513, 14289), (2937, 7361), (4539, 4763)]