20781617675

素因数分解:

$5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{853}}^1\times {\mathrm{10709}}^1$

素因数の和:11592

約数の個数: 48

約数和(自身を含む): 31756092480

約数和(自身を除く): 10974474805

約数列:

[1, 5, 7, 13, 25, 35, 65, 91, 175, 325, 455, 853, 2275, 4265, 5971, 10709, 11089, 21325, 29855, 53545, 55445, 74963, 77623, 139217, 149275, 267725, 277225, 374815, 388115, 696085, 974519, 1874075, 1940575, 3480425, 4872595, 9134777, 24362975, 45673885, 63943439, 118752101, 228369425, 319717195, 593760505, 831264707, 1598585975, 2968802525, 4156323535, 20781617675]

約数ペア:

[(1, 20781617675), (5, 4156323535), (7, 2968802525), (13, 1598585975), (25, 831264707), (35, 593760505), (65, 319717195), (91, 228369425), (175, 118752101), (325, 63943439), (455, 45673885), (853, 24362975), (2275, 9134777), (4265, 4872595), (5971, 3480425), (10709, 1940575), (11089, 1874075), (21325, 974519), (29855, 696085), (53545, 388115), (55445, 374815), (74963, 277225), (77623, 267725), (139217, 149275)]