21215055

素因数分解:

$3^1\times 5^1\times {\mathrm{79}}^1\times {\mathrm{17903}}^1$

素因数の和:17990

約数の個数: 16

約数和(自身を含む): 34375680

約数和(自身を除く): 13160625

約数列:

[1, 3, 5, 15, 79, 237, 395, 1185, 17903, 53709, 89515, 268545, 1414337, 4243011, 7071685, 21215055]

約数ペア:

[(1, 21215055), (3, 7071685), (5, 4243011), (15, 1414337), (79, 268545), (237, 89515), (395, 53709), (1185, 17903)]