21470720

素因数分解:

$2^9\times 5^1\times {\mathrm{8387}}^1$

素因数の和:8410

約数の個数: 40

約数和(自身を含む): 51485544

約数和(自身を除く): 30014824

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1280, 2560, 8387, 16774, 33548, 41935, 67096, 83870, 134192, 167740, 268384, 335480, 536768, 670960, 1073536, 1341920, 2147072, 2683840, 4294144, 5367680, 10735360, 21470720]

約数ペア:

[(1, 21470720), (2, 10735360), (4, 5367680), (5, 4294144), (8, 2683840), (10, 2147072), (16, 1341920), (20, 1073536), (32, 670960), (40, 536768), (64, 335480), (80, 268384), (128, 167740), (160, 134192), (256, 83870), (320, 67096), (512, 41935), (640, 33548), (1280, 16774), (2560, 8387)]