21885115

素因数分解:

$5^1\times 7^4\times {\mathrm{1823}}^1$

素因数の和:1856

約数の個数: 20

約数和(自身を含む): 30654144

約数和(自身を除く): 8769029

約数列:

[1, 5, 7, 35, 49, 245, 343, 1715, 1823, 2401, 9115, 12005, 12761, 63805, 89327, 446635, 625289, 3126445, 4377023, 21885115]

約数ペア:

[(1, 21885115), (5, 4377023), (7, 3126445), (35, 625289), (49, 446635), (245, 89327), (343, 63805), (1715, 12761), (1823, 12005), (2401, 9115)]