21294705

素因数分解:

$3^1\times 5^1\times {\mathrm{131}}^1\times {\mathrm{10837}}^1$

素因数の和:10976

約数の個数: 16

約数和(自身を含む): 34334784

約数和(自身を除く): 13040079

約数列:

[1, 3, 5, 15, 131, 393, 655, 1965, 10837, 32511, 54185, 162555, 1419647, 4258941, 7098235, 21294705]

約数ペア:

[(1, 21294705), (3, 7098235), (5, 4258941), (15, 1419647), (131, 162555), (393, 54185), (655, 32511), (1965, 10837)]