21252640

素因数分解:

$2^5\times 5^1\times {\mathrm{19}}^1\times {\mathrm{6991}}^1$

素因数の和:7025

約数の個数: 48

約数和(自身を含む): 52859520

約数和(自身を除く): 31606880

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 76, 80, 95, 152, 160, 190, 304, 380, 608, 760, 1520, 3040, 6991, 13982, 27964, 34955, 55928, 69910, 111856, 132829, 139820, 223712, 265658, 279640, 531316, 559280, 664145, 1062632, 1118560, 1328290, 2125264, 2656580, 4250528, 5313160, 10626320, 21252640]

約数ペア:

[(1, 21252640), (2, 10626320), (4, 5313160), (5, 4250528), (8, 2656580), (10, 2125264), (16, 1328290), (19, 1118560), (20, 1062632), (32, 664145), (38, 559280), (40, 531316), (76, 279640), (80, 265658), (95, 223712), (152, 139820), (160, 132829), (190, 111856), (304, 69910), (380, 55928), (608, 34955), (760, 27964), (1520, 13982), (3040, 6991)]