208500021

素因数分解:

$3^3\times {\mathrm{149}}^1\times {\mathrm{51827}}^1$

素因数の和:51985

約数の個数: 16

約数和(自身を含む): 310968000

約数和(自身を除く): 102467979

約数列:

[1, 3, 9, 27, 149, 447, 1341, 4023, 51827, 155481, 466443, 1399329, 7722223, 23166669, 69500007, 208500021]

約数ペア:

[(1, 208500021), (3, 69500007), (9, 23166669), (27, 7722223), (149, 1399329), (447, 466443), (1341, 155481), (4023, 51827)]