20128703

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{109}}^1$

素因数の和:207

約数の個数: 32

約数和(自身を含む): 25681920

約数和(自身を除く): 5553217

約数列:

[1, 7, 23, 31, 37, 109, 161, 217, 259, 713, 763, 851, 1147, 2507, 3379, 4033, 4991, 5957, 8029, 17549, 23653, 26381, 28231, 77717, 92759, 125023, 184667, 544019, 649313, 875161, 2875529, 20128703]

約数ペア:

[(1, 20128703), (7, 2875529), (23, 875161), (31, 649313), (37, 544019), (109, 184667), (161, 125023), (217, 92759), (259, 77717), (713, 28231), (763, 26381), (851, 23653), (1147, 17549), (2507, 8029), (3379, 5957), (4033, 4991)]