21245235

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{331}}^1\times {\mathrm{389}}^1$

素因数の和:739

約数の個数: 32

約数和(自身を含む): 37290240

約数和(自身を除く): 16045005

約数列:

[1, 3, 5, 11, 15, 33, 55, 165, 331, 389, 993, 1167, 1655, 1945, 3641, 4279, 4965, 5835, 10923, 12837, 18205, 21395, 54615, 64185, 128759, 386277, 643795, 1416349, 1931385, 4249047, 7081745, 21245235]

約数ペア:

[(1, 21245235), (3, 7081745), (5, 4249047), (11, 1931385), (15, 1416349), (33, 643795), (55, 386277), (165, 128759), (331, 64185), (389, 54615), (993, 21395), (1167, 18205), (1655, 12837), (1945, 10923), (3641, 5835), (4279, 4965)]