21069613

素因数分解:

${\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1$

素因数の和:157

約数の個数: 32

約数和(自身を含む): 25280640

約数和(自身を除く): 4211027

約数列:

[1, 17, 19, 37, 41, 43, 323, 629, 697, 703, 731, 779, 817, 1517, 1591, 1763, 11951, 13243, 13889, 25789, 27047, 28823, 29971, 30229, 33497, 65231, 489991, 513893, 569449, 1108927, 1239389, 21069613]

約数ペア:

[(1, 21069613), (17, 1239389), (19, 1108927), (37, 569449), (41, 513893), (43, 489991), (323, 65231), (629, 33497), (697, 30229), (703, 29971), (731, 28823), (779, 27047), (817, 25789), (1517, 13889), (1591, 13243), (1763, 11951)]