19865781

素因数分解:

$3^2\times {\mathrm{13}}^2\times {\mathrm{37}}^1\times {\mathrm{353}}^1$

素因数の和:422

約数の個数: 36

約数和(自身を含む): 32002308

約数和(自身を除く): 12136527

約数列:

[1, 3, 9, 13, 37, 39, 111, 117, 169, 333, 353, 481, 507, 1059, 1443, 1521, 3177, 4329, 4589, 6253, 13061, 13767, 18759, 39183, 41301, 56277, 59657, 117549, 169793, 178971, 509379, 536913, 1528137, 2207309, 6621927, 19865781]

約数ペア:

[(1, 19865781), (3, 6621927), (9, 2207309), (13, 1528137), (37, 536913), (39, 509379), (111, 178971), (117, 169793), (169, 117549), (333, 59657), (353, 56277), (481, 41301), (507, 39183), (1059, 18759), (1443, 13767), (1521, 13061), (3177, 6253), (4329, 4589)]