21164241

素因数分解:

$3^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1\times {\mathrm{523}}^1$

素因数の和:621

約数の個数: 32

約数和(自身を含む): 33804288

約数和(自身を除く): 12640047

約数列:

[1, 3, 7, 21, 41, 47, 123, 141, 287, 329, 523, 861, 987, 1569, 1927, 3661, 5781, 10983, 13489, 21443, 24581, 40467, 64329, 73743, 150101, 172067, 450303, 516201, 1007821, 3023463, 7054747, 21164241]

約数ペア:

[(1, 21164241), (3, 7054747), (7, 3023463), (21, 1007821), (41, 516201), (47, 450303), (123, 172067), (141, 150101), (287, 73743), (329, 64329), (523, 40467), (861, 24581), (987, 21443), (1569, 13489), (1927, 10983), (3661, 5781)]