21985505

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{3643}}^1$

素因数の和:3736

約数の個数: 16

約数和(自身を含む): 28335744

約数和(自身を除く): 6350239

約数列:

[1, 5, 17, 71, 85, 355, 1207, 3643, 6035, 18215, 61931, 258653, 309655, 1293265, 4397101, 21985505]

約数ペア:

[(1, 21985505), (5, 4397101), (17, 1293265), (71, 309655), (85, 258653), (355, 61931), (1207, 18215), (3643, 6035)]