21123216

素因数分解:

$2^4\times 3^2\times {\mathrm{383}}^2$

素因数の和:780

約数の個数: 45

約数和(自身を含む): 59270419

約数和(自身を除く): 38147203

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 36, 48, 72, 144, 383, 766, 1149, 1532, 2298, 3064, 3447, 4596, 6128, 6894, 9192, 13788, 18384, 27576, 55152, 146689, 293378, 440067, 586756, 880134, 1173512, 1320201, 1760268, 2347024, 2640402, 3520536, 5280804, 7041072, 10561608, 21123216]

約数ペア:

[(1, 21123216), (2, 10561608), (3, 7041072), (4, 5280804), (6, 3520536), (8, 2640402), (9, 2347024), (12, 1760268), (16, 1320201), (18, 1173512), (24, 880134), (36, 586756), (48, 440067), (72, 293378), (144, 146689), (383, 55152), (766, 27576), (1149, 18384), (1532, 13788), (2298, 9192), (3064, 6894), (3447, 6128)]