19977419

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{401}}^1\times {\mathrm{647}}^1$

素因数の和:1066

約数の個数: 16

約数和(自身を含む): 25007616

約数和(自身を除く): 5030197

約数列:

[1, 7, 11, 77, 401, 647, 2807, 4411, 4529, 7117, 30877, 49819, 259447, 1816129, 2853917, 19977419]

約数ペア:

[(1, 19977419), (7, 2853917), (11, 1816129), (77, 259447), (401, 49819), (647, 30877), (2807, 7117), (4411, 4529)]