20998420

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{55259}}^1$

素因数の和:55287

約数の個数: 24

約数和(自身を含む): 46418400

約数和(自身を除く): 25419980

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 55259, 110518, 221036, 276295, 552590, 1049921, 1105180, 2099842, 4199684, 5249605, 10499210, 20998420]

約数ペア:

[(1, 20998420), (2, 10499210), (4, 5249605), (5, 4199684), (10, 2099842), (19, 1105180), (20, 1049921), (38, 552590), (76, 276295), (95, 221036), (190, 110518), (380, 55259)]