21392575

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{1553}}^1$

素因数の和:1611

約数の個数: 24

約数和(自身を含む): 28904400

約数和(自身を除く): 7511825

約数列:

[1, 5, 19, 25, 29, 95, 145, 475, 551, 725, 1553, 2755, 7765, 13775, 29507, 38825, 45037, 147535, 225185, 737675, 855703, 1125925, 4278515, 21392575]

約数ペア:

[(1, 21392575), (5, 4278515), (19, 1125925), (25, 855703), (29, 737675), (95, 225185), (145, 147535), (475, 45037), (551, 38825), (725, 29507), (1553, 13775), (2755, 7765)]