19978155

素因数分解:

$3^2\times 5^1\times {\mathrm{131}}^1\times {\mathrm{3389}}^1$

素因数の和:3531

約数の個数: 24

約数和(自身を含む): 34903440

約数和(自身を除く): 14925285

約数列:

[1, 3, 5, 9, 15, 45, 131, 393, 655, 1179, 1965, 3389, 5895, 10167, 16945, 30501, 50835, 152505, 443959, 1331877, 2219795, 3995631, 6659385, 19978155]

約数ペア:

[(1, 19978155), (3, 6659385), (5, 3995631), (9, 2219795), (15, 1331877), (45, 443959), (131, 152505), (393, 50835), (655, 30501), (1179, 16945), (1965, 10167), (3389, 5895)]