21486555

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{28087}}^1$

素因数の和:28115

約数の個数: 24

約数和(自身を含む): 39435552

約数和(自身を除く): 17948997

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 85, 153, 255, 765, 28087, 84261, 140435, 252783, 421305, 477479, 1263915, 1432437, 2387395, 4297311, 7162185, 21486555]

約数ペア:

[(1, 21486555), (3, 7162185), (5, 4297311), (9, 2387395), (15, 1432437), (17, 1263915), (45, 477479), (51, 421305), (85, 252783), (153, 140435), (255, 84261), (765, 28087)]