18920881

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{223}}^1$

素因数の和:301

約数の個数: 32

約数和(自身を含む): 24772608

約数和(自身を除く): 5851727

約数列:

[1, 7, 17, 23, 31, 119, 161, 217, 223, 391, 527, 713, 1561, 2737, 3689, 3791, 4991, 5129, 6913, 12121, 26537, 35903, 48391, 84847, 87193, 117521, 158999, 610351, 822647, 1112993, 2702983, 18920881]

約数ペア:

[(1, 18920881), (7, 2702983), (17, 1112993), (23, 822647), (31, 610351), (119, 158999), (161, 117521), (217, 87193), (223, 84847), (391, 48391), (527, 35903), (713, 26537), (1561, 12121), (2737, 6913), (3689, 5129), (3791, 4991)]