21635840

素因数分解:

$2^8\times 5^1\times {\mathrm{16903}}^1$

素因数の和:16924

約数の個数: 36

約数和(自身を含む): 51827664

約数和(自身を除く): 30191824

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 1280, 16903, 33806, 67612, 84515, 135224, 169030, 270448, 338060, 540896, 676120, 1081792, 1352240, 2163584, 2704480, 4327168, 5408960, 10817920, 21635840]

約数ペア:

[(1, 21635840), (2, 10817920), (4, 5408960), (5, 4327168), (8, 2704480), (10, 2163584), (16, 1352240), (20, 1081792), (32, 676120), (40, 540896), (64, 338060), (80, 270448), (128, 169030), (160, 135224), (256, 84515), (320, 67612), (640, 33806), (1280, 16903)]