20487680

素因数分解:

$2^9\times 5^1\times {\mathrm{53}}^1\times {\mathrm{151}}^1$

素因数の和:227

約数の個数: 80

約数和(自身を含む): 50380704

約数和(自身を除く): 29893024

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 53, 64, 80, 106, 128, 151, 160, 212, 256, 265, 302, 320, 424, 512, 530, 604, 640, 755, 848, 1060, 1208, 1280, 1510, 1696, 2120, 2416, 2560, 3020, 3392, 4240, 4832, 6040, 6784, 8003, 8480, 9664, 12080, 13568, 16006, 16960, 19328, 24160, 27136, 32012, 33920, 38656, 40015, 48320, 64024, 67840, 77312, 80030, 96640, 128048, 135680, 160060, 193280, 256096, 320120, 386560, 512192, 640240, 1024384, 1280480, 2048768, 2560960, 4097536, 5121920, 10243840, 20487680]

約数ペア:

[(1, 20487680), (2, 10243840), (4, 5121920), (5, 4097536), (8, 2560960), (10, 2048768), (16, 1280480), (20, 1024384), (32, 640240), (40, 512192), (53, 386560), (64, 320120), (80, 256096), (106, 193280), (128, 160060), (151, 135680), (160, 128048), (212, 96640), (256, 80030), (265, 77312), (302, 67840), (320, 64024), (424, 48320), (512, 40015), (530, 38656), (604, 33920), (640, 32012), (755, 27136), (848, 24160), (1060, 19328), (1208, 16960), (1280, 16006), (1510, 13568), (1696, 12080), (2120, 9664), (2416, 8480), (2560, 8003), (3020, 6784), (3392, 6040), (4240, 4832)]