1980220

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{9001}}^1$

素因数の和:9021

約数の個数: 24

約数和(自身を含む): 4537008

約数和(自身を除く): 2556788

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 9001, 18002, 36004, 45005, 90010, 99011, 180020, 198022, 396044, 495055, 990110, 1980220]

約数ペア:

[(1, 1980220), (2, 990110), (4, 495055), (5, 396044), (10, 198022), (11, 180020), (20, 99011), (22, 90010), (44, 45005), (55, 36004), (110, 18002), (220, 9001)]