19781140

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{11113}}^1$

素因数の和:11211

約数の個数: 24

約数和(自身を含む): 42010920

約数和(自身を除く): 22229780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 11113, 22226, 44452, 55565, 111130, 222260, 989057, 1978114, 3956228, 4945285, 9890570, 19781140]

約数ペア:

[(1, 19781140), (2, 9890570), (4, 4945285), (5, 3956228), (10, 1978114), (20, 989057), (89, 222260), (178, 111130), (356, 55565), (445, 44452), (890, 22226), (1780, 11113)]