1661504005

素因数分解:

$5^1\times 7^4\times {\mathrm{138401}}^1$

素因数の和:138434

約数の個数: 20

約数和(自身を含む): 2325984012

約数和(自身を除く): 664480007

約数列:

[1, 5, 7, 35, 49, 245, 343, 1715, 2401, 12005, 138401, 692005, 968807, 4844035, 6781649, 33908245, 47471543, 237357715, 332300801, 1661504005]

約数ペア:

[(1, 1661504005), (5, 332300801), (7, 237357715), (35, 47471543), (49, 33908245), (245, 6781649), (343, 4844035), (1715, 968807), (2401, 692005), (12005, 138401)]