21601280

素因数分解:

$2^{10}\times 5^1\times {\mathrm{4219}}^1$

素因数の和:4244

約数の個数: 44

約数和(自身を含む): 51830040

約数和(自身を除く): 30228760

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1024, 1280, 2560, 4219, 5120, 8438, 16876, 21095, 33752, 42190, 67504, 84380, 135008, 168760, 270016, 337520, 540032, 675040, 1080064, 1350080, 2160128, 2700160, 4320256, 5400320, 10800640, 21601280]

約数ペア:

[(1, 21601280), (2, 10800640), (4, 5400320), (5, 4320256), (8, 2700160), (10, 2160128), (16, 1350080), (20, 1080064), (32, 675040), (40, 540032), (64, 337520), (80, 270016), (128, 168760), (160, 135008), (256, 84380), (320, 67504), (512, 42190), (640, 33752), (1024, 21095), (1280, 16876), (2560, 8438), (4219, 5120)]