21711860

素因数分解:

$2^2\times 5^1\times {\mathrm{557}}^1\times {\mathrm{1949}}^1$

素因数の和:2515

約数の個数: 24

約数和(自身を含む): 45700200

約数和(自身を除く): 23988340

約数列:

[1, 2, 4, 5, 10, 20, 557, 1114, 1949, 2228, 2785, 3898, 5570, 7796, 9745, 11140, 19490, 38980, 1085593, 2171186, 4342372, 5427965, 10855930, 21711860]

約数ペア:

[(1, 21711860), (2, 10855930), (4, 5427965), (5, 4342372), (10, 2171186), (20, 1085593), (557, 38980), (1114, 19490), (1949, 11140), (2228, 9745), (2785, 7796), (3898, 5570)]