20986721

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{5689}}^1$

素因数の和:5744

約数の個数: 16

約数和(自身を含む): 26219520

約数和(自身を除く): 5232799

約数列:

[1, 7, 17, 31, 119, 217, 527, 3689, 5689, 39823, 96713, 176359, 676991, 1234513, 2998103, 20986721]

約数ペア:

[(1, 20986721), (7, 2998103), (17, 1234513), (31, 676991), (119, 176359), (217, 96713), (527, 39823), (3689, 5689)]