19910187

素因数分解:

$3^2\times {\mathrm{11}}^2\times {\mathrm{47}}^1\times {\mathrm{389}}^1$

素因数の和:464

約数の個数: 36

約数和(自身を含む): 32366880

約数和(自身を除く): 12456693

約数列:

[1, 3, 9, 11, 33, 47, 99, 121, 141, 363, 389, 423, 517, 1089, 1167, 1551, 3501, 4279, 4653, 5687, 12837, 17061, 18283, 38511, 47069, 51183, 54849, 141207, 164547, 201113, 423621, 603339, 1810017, 2212243, 6636729, 19910187]

約数ペア:

[(1, 19910187), (3, 6636729), (9, 2212243), (11, 1810017), (33, 603339), (47, 423621), (99, 201113), (121, 164547), (141, 141207), (363, 54849), (389, 51183), (423, 47069), (517, 38511), (1089, 18283), (1167, 17061), (1551, 12837), (3501, 5687), (4279, 4653)]