19720965

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{2543}}^1$

素因数の和:2609

約数の個数: 32

約数和(自身を含む): 35168256

約数和(自身を除く): 15447291

約数列:

[1, 3, 5, 11, 15, 33, 47, 55, 141, 165, 235, 517, 705, 1551, 2543, 2585, 7629, 7755, 12715, 27973, 38145, 83919, 119521, 139865, 358563, 419595, 597605, 1314731, 1792815, 3944193, 6573655, 19720965]

約数ペア:

[(1, 19720965), (3, 6573655), (5, 3944193), (11, 1792815), (15, 1314731), (33, 597605), (47, 419595), (55, 358563), (141, 139865), (165, 119521), (235, 83919), (517, 38145), (705, 27973), (1551, 12715), (2543, 7755), (2585, 7629)]