21441970

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{397}}^1\times {\mathrm{491}}^1$

素因数の和:906

約数の個数: 32

約数和(自身を含む): 42296256

約数和(自身を除く): 20854286

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 397, 491, 794, 982, 1985, 2455, 3970, 4367, 4910, 5401, 8734, 10802, 21835, 27005, 43670, 54010, 194927, 389854, 974635, 1949270, 2144197, 4288394, 10720985, 21441970]

約数ペア:

[(1, 21441970), (2, 10720985), (5, 4288394), (10, 2144197), (11, 1949270), (22, 974635), (55, 389854), (110, 194927), (397, 54010), (491, 43670), (794, 27005), (982, 21835), (1985, 10802), (2455, 8734), (3970, 5401), (4367, 4910)]