21105329

素因数分解:

$7^2\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{307}}^1$

素因数の和:405

約数の個数: 24

約数和(自身を含む): 26123328

約数和(自身を除く): 5017999

約数列:

[1, 7, 23, 49, 61, 161, 307, 427, 1127, 1403, 2149, 2989, 7061, 9821, 15043, 18727, 49427, 68747, 131089, 345989, 430721, 917623, 3015047, 21105329]

約数ペア:

[(1, 21105329), (7, 3015047), (23, 917623), (49, 430721), (61, 345989), (161, 131089), (307, 68747), (427, 49427), (1127, 18727), (1403, 15043), (2149, 9821), (2989, 7061)]