19988140

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{27011}}^1$

素因数の和:27057

約数の個数: 24

約数和(自身を含む): 43111152

約数和(自身を除く): 23123012

約数列:

[1, 2, 4, 5, 10, 20, 37, 74, 148, 185, 370, 740, 27011, 54022, 108044, 135055, 270110, 540220, 999407, 1998814, 3997628, 4997035, 9994070, 19988140]

約数ペア:

[(1, 19988140), (2, 9994070), (4, 4997035), (5, 3997628), (10, 1998814), (20, 999407), (37, 540220), (74, 270110), (148, 135055), (185, 108044), (370, 54022), (740, 27011)]