21377391

素因数分解:

$3^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{19207}}^1$

素因数の和:19270

約数の個数: 16

約数和(自身を含む): 33191424

約数和(自身を除く): 11814033

約数列:

[1, 3, 7, 21, 53, 159, 371, 1113, 19207, 57621, 134449, 403347, 1017971, 3053913, 7125797, 21377391]

約数ペア:

[(1, 21377391), (3, 7125797), (7, 3053913), (21, 1017971), (53, 403347), (159, 134449), (371, 57621), (1113, 19207)]