21017676800

素因数分解:

$2^{10}\times 5^2\times {\mathrm{821003}}^1$

素因数の和:821033

約数の個数: 66

約数和(自身を含む): 52098450828

約数和(自身を除く): 31080774028

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 128, 160, 200, 256, 320, 400, 512, 640, 800, 1024, 1280, 1600, 2560, 3200, 5120, 6400, 12800, 25600, 821003, 1642006, 3284012, 4105015, 6568024, 8210030, 13136048, 16420060, 20525075, 26272096, 32840120, 41050150, 52544192, 65680240, 82100300, 105088384, 131360480, 164200600, 210176768, 262720960, 328401200, 420353536, 525441920, 656802400, 840707072, 1050883840, 1313604800, 2101767680, 2627209600, 4203535360, 5254419200, 10508838400, 21017676800]

約数ペア:

[(1, 21017676800), (2, 10508838400), (4, 5254419200), (5, 4203535360), (8, 2627209600), (10, 2101767680), (16, 1313604800), (20, 1050883840), (25, 840707072), (32, 656802400), (40, 525441920), (50, 420353536), (64, 328401200), (80, 262720960), (100, 210176768), (128, 164200600), (160, 131360480), (200, 105088384), (256, 82100300), (320, 65680240), (400, 52544192), (512, 41050150), (640, 32840120), (800, 26272096), (1024, 20525075), (1280, 16420060), (1600, 13136048), (2560, 8210030), (3200, 6568024), (5120, 4105015), (6400, 3284012), (12800, 1642006), (25600, 821003)]