19908471

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{293}}^1$

素因数の和:407

約数の個数: 32

約数和(自身を含む): 30481920

約数和(自身を除く): 10573449

約数列:

[1, 3, 11, 29, 33, 71, 87, 213, 293, 319, 781, 879, 957, 2059, 2343, 3223, 6177, 8497, 9669, 20803, 22649, 25491, 62409, 67947, 93467, 228833, 280401, 603287, 686499, 1809861, 6636157, 19908471]

約数ペア:

[(1, 19908471), (3, 6636157), (11, 1809861), (29, 686499), (33, 603287), (71, 280401), (87, 228833), (213, 93467), (293, 67947), (319, 62409), (781, 25491), (879, 22649), (957, 20803), (2059, 9669), (2343, 8497), (3223, 6177)]