21703985

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{151}}^1$

素因数の和:281

約数の個数: 32

約数和(自身を含む): 29548800

約数和(自身を除く): 7844815

約数列:

[1, 5, 17, 19, 85, 89, 95, 151, 323, 445, 755, 1513, 1615, 1691, 2567, 2869, 7565, 8455, 12835, 13439, 14345, 28747, 48773, 67195, 143735, 228463, 243865, 255341, 1142315, 1276705, 4340797, 21703985]

約数ペア:

[(1, 21703985), (5, 4340797), (17, 1276705), (19, 1142315), (85, 255341), (89, 243865), (95, 228463), (151, 143735), (323, 67195), (445, 48773), (755, 28747), (1513, 14345), (1615, 13439), (1691, 12835), (2567, 8455), (2869, 7565)]