21747089

素因数分解:

$7^1\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{593}}^1$

素因数の和:657

約数の個数: 24

約数和(自身を含む): 27827712

約数和(自身を除く): 6080623

約数列:

[1, 7, 13, 31, 91, 169, 217, 403, 593, 1183, 2821, 4151, 5239, 7709, 18383, 36673, 53963, 100217, 128681, 238979, 701519, 1672853, 3106727, 21747089]

約数ペア:

[(1, 21747089), (7, 3106727), (13, 1672853), (31, 701519), (91, 238979), (169, 128681), (217, 100217), (403, 53963), (593, 36673), (1183, 18383), (2821, 7709), (4151, 5239)]