20890970

素因数分解:

$2^1\times 5^1\times {\mathrm{89}}^1\times {\mathrm{23473}}^1$

素因数の和:23569

約数の個数: 16

約数和(自身を含む): 38027880

約数和(自身を除く): 17136910

約数列:

[1, 2, 5, 10, 89, 178, 445, 890, 23473, 46946, 117365, 234730, 2089097, 4178194, 10445485, 20890970]

約数ペア:

[(1, 20890970), (2, 10445485), (5, 4178194), (10, 2089097), (89, 234730), (178, 117365), (445, 46946), (890, 23473)]