21260854

素因数分解:

$2^1\times {\mathrm{31}}^1\times {\mathrm{89}}^1\times {\mathrm{3853}}^1$

素因数の和:3975

約数の個数: 16

約数和(自身を含む): 33298560

約数和(自身を除く): 12037706

約数列:

[1, 2, 31, 62, 89, 178, 2759, 3853, 5518, 7706, 119443, 238886, 342917, 685834, 10630427, 21260854]

約数ペア:

[(1, 21260854), (2, 10630427), (31, 685834), (62, 342917), (89, 238886), (178, 119443), (2759, 7706), (3853, 5518)]