21263360

素因数分解:

$2^{10}\times 5^1\times {\mathrm{4153}}^1$

素因数の和:4178

約数の個数: 44

約数和(自身を含む): 51019428

約数和(自身を除く): 29756068

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1024, 1280, 2560, 4153, 5120, 8306, 16612, 20765, 33224, 41530, 66448, 83060, 132896, 166120, 265792, 332240, 531584, 664480, 1063168, 1328960, 2126336, 2657920, 4252672, 5315840, 10631680, 21263360]

約数ペア:

[(1, 21263360), (2, 10631680), (4, 5315840), (5, 4252672), (8, 2657920), (10, 2126336), (16, 1328960), (20, 1063168), (32, 664480), (40, 531584), (64, 332240), (80, 265792), (128, 166120), (160, 132896), (256, 83060), (320, 66448), (512, 41530), (640, 33224), (1024, 20765), (1280, 16612), (2560, 8306), (4153, 5120)]