21611840

素因数分解:

$2^6\times 5^1\times {\mathrm{67537}}^1$

素因数の和:67554

約数の個数: 28

約数和(自身を含む): 51463956

約数和(自身を除く): 29852116

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 67537, 135074, 270148, 337685, 540296, 675370, 1080592, 1350740, 2161184, 2701480, 4322368, 5402960, 10805920, 21611840]

約数ペア:

[(1, 21611840), (2, 10805920), (4, 5402960), (5, 4322368), (8, 2701480), (10, 2161184), (16, 1350740), (20, 1080592), (32, 675370), (40, 540296), (64, 337685), (80, 270148), (160, 135074), (320, 67537)]