21638080

素因数分解:

$2^6\times 5^1\times {\mathrm{67619}}^1$

素因数の和:67636

約数の個数: 28

約数和(自身を含む): 51526440

約数和(自身を除く): 29888360

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 67619, 135238, 270476, 338095, 540952, 676190, 1081904, 1352380, 2163808, 2704760, 4327616, 5409520, 10819040, 21638080]

約数ペア:

[(1, 21638080), (2, 10819040), (4, 5409520), (5, 4327616), (8, 2704760), (10, 2163808), (16, 1352380), (20, 1081904), (32, 676190), (40, 540952), (64, 338095), (80, 270476), (160, 135238), (320, 67619)]