21571840

素因数分解:

$2^8\times 5^1\times {\mathrm{19}}^1\times {\mathrm{887}}^1$

素因数の和:927

約数の個数: 72

約数和(自身を含む): 54452160

約数和(自身を除く): 32880320

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, 608, 640, 760, 887, 1216, 1280, 1520, 1774, 2432, 3040, 3548, 4435, 4864, 6080, 7096, 8870, 12160, 14192, 16853, 17740, 24320, 28384, 33706, 35480, 56768, 67412, 70960, 84265, 113536, 134824, 141920, 168530, 227072, 269648, 283840, 337060, 539296, 567680, 674120, 1078592, 1135360, 1348240, 2157184, 2696480, 4314368, 5392960, 10785920, 21571840]

約数ペア:

[(1, 21571840), (2, 10785920), (4, 5392960), (5, 4314368), (8, 2696480), (10, 2157184), (16, 1348240), (19, 1135360), (20, 1078592), (32, 674120), (38, 567680), (40, 539296), (64, 337060), (76, 283840), (80, 269648), (95, 227072), (128, 168530), (152, 141920), (160, 134824), (190, 113536), (256, 84265), (304, 70960), (320, 67412), (380, 56768), (608, 35480), (640, 33706), (760, 28384), (887, 24320), (1216, 17740), (1280, 16853), (1520, 14192), (1774, 12160), (2432, 8870), (3040, 7096), (3548, 6080), (4435, 4864)]