19877151

素因数分解:

$3^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{127}}^1\times {\mathrm{257}}^1$

素因数の和:423

約数の個数: 32

約数和(自身を含む): 31703040

約数和(自身を除く): 11825889

約数列:

[1, 3, 7, 21, 29, 87, 127, 203, 257, 381, 609, 771, 889, 1799, 2667, 3683, 5397, 7453, 11049, 22359, 25781, 32639, 52171, 77343, 97917, 156513, 228473, 685419, 946531, 2839593, 6625717, 19877151]

約数ペア:

[(1, 19877151), (3, 6625717), (7, 2839593), (21, 946531), (29, 685419), (87, 228473), (127, 156513), (203, 97917), (257, 77343), (381, 52171), (609, 32639), (771, 25781), (889, 22359), (1799, 11049), (2667, 7453), (3683, 5397)]