20427520

素因数分解:

$2^8\times 5^1\times {\mathrm{15959}}^1$

素因数の和:15980

約数の個数: 36

約数和(自身を含む): 48933360

約数和(自身を除く): 28505840

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 1280, 15959, 31918, 63836, 79795, 127672, 159590, 255344, 319180, 510688, 638360, 1021376, 1276720, 2042752, 2553440, 4085504, 5106880, 10213760, 20427520]

約数ペア:

[(1, 20427520), (2, 10213760), (4, 5106880), (5, 4085504), (8, 2553440), (10, 2042752), (16, 1276720), (20, 1021376), (32, 638360), (40, 510688), (64, 319180), (80, 255344), (128, 159590), (160, 127672), (256, 79795), (320, 63836), (640, 31918), (1280, 15959)]