21345849

素因数分解:

$3^6\times 7^1\times {\mathrm{47}}^1\times {\mathrm{89}}^1$

素因数の和:161

約数の個数: 56

約数和(自身を含む): 37774080

約数和(自身を除く): 16428231

約数列:

[1, 3, 7, 9, 21, 27, 47, 63, 81, 89, 141, 189, 243, 267, 329, 423, 567, 623, 729, 801, 987, 1269, 1701, 1869, 2403, 2961, 3807, 4183, 5103, 5607, 7209, 8883, 11421, 12549, 16821, 21627, 26649, 29281, 34263, 37647, 50463, 64881, 79947, 87843, 112941, 151389, 239841, 263529, 338823, 454167, 790587, 1016469, 2371761, 3049407, 7115283, 21345849]

約数ペア:

[(1, 21345849), (3, 7115283), (7, 3049407), (9, 2371761), (21, 1016469), (27, 790587), (47, 454167), (63, 338823), (81, 263529), (89, 239841), (141, 151389), (189, 112941), (243, 87843), (267, 79947), (329, 64881), (423, 50463), (567, 37647), (623, 34263), (729, 29281), (801, 26649), (987, 21627), (1269, 16821), (1701, 12549), (1869, 11421), (2403, 8883), (2961, 7209), (3807, 5607), (4183, 5103)]