21138560

素因数分解:

$2^7\times 5^1\times {\mathrm{33029}}^1$

素因数の和:33048

約数の個数: 32

約数和(自身を含む): 50535900

約数和(自身を除く): 29397340

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 33029, 66058, 132116, 165145, 264232, 330290, 528464, 660580, 1056928, 1321160, 2113856, 2642320, 4227712, 5284640, 10569280, 21138560]

約数ペア:

[(1, 21138560), (2, 10569280), (4, 5284640), (5, 4227712), (8, 2642320), (10, 2113856), (16, 1321160), (20, 1056928), (32, 660580), (40, 528464), (64, 330290), (80, 264232), (128, 165145), (160, 132116), (320, 66058), (640, 33029)]