19520680

素因数分解:

$2^3\times 5^1\times {\mathrm{401}}^1\times {\mathrm{1217}}^1$

素因数の和:1629

約数の個数: 32

約数和(自身を含む): 44067240

約数和(自身を除く): 24546560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 401, 802, 1217, 1604, 2005, 2434, 3208, 4010, 4868, 6085, 8020, 9736, 12170, 16040, 24340, 48680, 488017, 976034, 1952068, 2440085, 3904136, 4880170, 9760340, 19520680]

約数ペア:

[(1, 19520680), (2, 9760340), (4, 4880170), (5, 3904136), (8, 2440085), (10, 1952068), (20, 976034), (40, 488017), (401, 48680), (802, 24340), (1217, 16040), (1604, 12170), (2005, 9736), (2434, 8020), (3208, 6085), (4010, 4868)]