21510321

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{677}}^1$

素因数の和:793

約数の個数: 32

約数和(自身を含む): 35147520

約数和(自身を除く): 13637199

約数列:

[1, 3, 7, 17, 21, 51, 89, 119, 267, 357, 623, 677, 1513, 1869, 2031, 4539, 4739, 10591, 11509, 14217, 31773, 34527, 60253, 80563, 180759, 241689, 421771, 1024301, 1265313, 3072903, 7170107, 21510321]

約数ペア:

[(1, 21510321), (3, 7170107), (7, 3072903), (17, 1265313), (21, 1024301), (51, 421771), (89, 241689), (119, 180759), (267, 80563), (357, 60253), (623, 34527), (677, 31773), (1513, 14217), (1869, 11509), (2031, 10591), (4539, 4739)]