87191721

素因数分解:

$3^4\times {\mathrm{37}}^1\times {\mathrm{47}}^1\times {\mathrm{619}}^1$

素因数の和:715

約数の個数: 40

約数和(自身を含む): 136836480

約数和(自身を除く): 49644759

約数列:

[1, 3, 9, 27, 37, 47, 81, 111, 141, 333, 423, 619, 999, 1269, 1739, 1857, 2997, 3807, 5217, 5571, 15651, 16713, 22903, 29093, 46953, 50139, 68709, 87279, 140859, 206127, 261837, 618381, 785511, 1076441, 1855143, 2356533, 3229323, 9687969, 29063907, 87191721]

約数ペア:

[(1, 87191721), (3, 29063907), (9, 9687969), (27, 3229323), (37, 2356533), (47, 1855143), (81, 1076441), (111, 785511), (141, 618381), (333, 261837), (423, 206127), (619, 140859), (999, 87279), (1269, 68709), (1739, 50139), (1857, 46953), (2997, 29093), (3807, 22903), (5217, 16713), (5571, 15651)]