21443905

素因数分解:

$5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{571}}^1$

素因数の和:649

約数の個数: 32

約数和(自身を含む): 31299840

約数和(自身を除く): 9855935

約数列:

[1, 5, 7, 29, 35, 37, 145, 185, 203, 259, 571, 1015, 1073, 1295, 2855, 3997, 5365, 7511, 16559, 19985, 21127, 37555, 82795, 105635, 115913, 147889, 579565, 612683, 739445, 3063415, 4288781, 21443905]

約数ペア:

[(1, 21443905), (5, 4288781), (7, 3063415), (29, 739445), (35, 612683), (37, 579565), (145, 147889), (185, 115913), (203, 105635), (259, 82795), (571, 37555), (1015, 21127), (1073, 19985), (1295, 16559), (2855, 7511), (3997, 5365)]