21177185

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{317}}^1\times {\mathrm{431}}^1$

素因数の和:784

約数の個数: 16

約数和(自身を含む): 26376192

約数和(自身を除く): 5199007

約数列:

[1, 5, 31, 155, 317, 431, 1585, 2155, 9827, 13361, 49135, 66805, 136627, 683135, 4235437, 21177185]

約数ペア:

[(1, 21177185), (5, 4235437), (31, 683135), (155, 136627), (317, 66805), (431, 49135), (1585, 13361), (2155, 9827)]