20928538

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{257}}^1\times {\mathrm{2143}}^1$

素因数の和:2421

約数の個数: 16

約数和(自身を含む): 33189120

約数和(自身を除く): 12260582

約数列:

[1, 2, 19, 38, 257, 514, 2143, 4286, 4883, 9766, 40717, 81434, 550751, 1101502, 10464269, 20928538]

約数ペア:

[(1, 20928538), (2, 10464269), (19, 1101502), (38, 550751), (257, 81434), (514, 40717), (2143, 9766), (4286, 4883)]