21642575

素因数分解:

$5^2\times {\mathrm{71}}^1\times {\mathrm{89}}^1\times {\mathrm{137}}^1$

素因数の和:307

約数の個数: 24

約数和(自身を含む): 27721440

約数和(自身を除く): 6078865

約数列:

[1, 5, 25, 71, 89, 137, 355, 445, 685, 1775, 2225, 3425, 6319, 9727, 12193, 31595, 48635, 60965, 157975, 243175, 304825, 865703, 4328515, 21642575]

約数ペア:

[(1, 21642575), (5, 4328515), (25, 865703), (71, 304825), (89, 243175), (137, 157975), (355, 60965), (445, 48635), (685, 31595), (1775, 12193), (2225, 9727), (3425, 6319)]