21352960

素因数分解:

$2^9\times 5^1\times {\mathrm{19}}^1\times {\mathrm{439}}^1$

素因数の和:481

約数の個数: 80

約数和(自身を含む): 54014400

約数和(自身を除く): 32661440

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 64, 76, 80, 95, 128, 152, 160, 190, 256, 304, 320, 380, 439, 512, 608, 640, 760, 878, 1216, 1280, 1520, 1756, 2195, 2432, 2560, 3040, 3512, 4390, 4864, 6080, 7024, 8341, 8780, 9728, 12160, 14048, 16682, 17560, 24320, 28096, 33364, 35120, 41705, 48640, 56192, 66728, 70240, 83410, 112384, 133456, 140480, 166820, 224768, 266912, 280960, 333640, 533824, 561920, 667280, 1067648, 1123840, 1334560, 2135296, 2669120, 4270592, 5338240, 10676480, 21352960]

約数ペア:

[(1, 21352960), (2, 10676480), (4, 5338240), (5, 4270592), (8, 2669120), (10, 2135296), (16, 1334560), (19, 1123840), (20, 1067648), (32, 667280), (38, 561920), (40, 533824), (64, 333640), (76, 280960), (80, 266912), (95, 224768), (128, 166820), (152, 140480), (160, 133456), (190, 112384), (256, 83410), (304, 70240), (320, 66728), (380, 56192), (439, 48640), (512, 41705), (608, 35120), (640, 33364), (760, 28096), (878, 24320), (1216, 17560), (1280, 16682), (1520, 14048), (1756, 12160), (2195, 9728), (2432, 8780), (2560, 8341), (3040, 7024), (3512, 6080), (4390, 4864)]