21672568

素因数分解:

$2^3\times {\mathrm{61}}^1\times {\mathrm{89}}^1\times {\mathrm{499}}^1$

素因数の和:655

約数の個数: 32

約数和(自身を含む): 41850000

約数和(自身を除く): 20177432

約数列:

[1, 2, 4, 8, 61, 89, 122, 178, 244, 356, 488, 499, 712, 998, 1996, 3992, 5429, 10858, 21716, 30439, 43432, 44411, 60878, 88822, 121756, 177644, 243512, 355288, 2709071, 5418142, 10836284, 21672568]

約数ペア:

[(1, 21672568), (2, 10836284), (4, 5418142), (8, 2709071), (61, 355288), (89, 243512), (122, 177644), (178, 121756), (244, 88822), (356, 60878), (488, 44411), (499, 43432), (712, 30439), (998, 21716), (1996, 10858), (3992, 5429)]