19871553

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1\times {\mathrm{293}}^1$

素因数の和:393

約数の個数: 32

約数和(自身を含む): 30030336

約数和(自身を除く): 10158783

約数列:

[1, 3, 13, 37, 39, 47, 111, 141, 293, 481, 611, 879, 1443, 1739, 1833, 3809, 5217, 10841, 11427, 13771, 22607, 32523, 41313, 67821, 140933, 179023, 422799, 509527, 537069, 1528581, 6623851, 19871553]

約数ペア:

[(1, 19871553), (3, 6623851), (13, 1528581), (37, 537069), (39, 509527), (47, 422799), (111, 179023), (141, 140933), (293, 67821), (481, 41313), (611, 32523), (879, 22607), (1443, 13771), (1739, 11427), (1833, 10841), (3809, 5217)]