21721270

素因数分解:

$2^1\times 5^1\times {\mathrm{971}}^1\times {\mathrm{2237}}^1$

素因数の和:3215

約数の個数: 16

約数和(自身を含む): 39156048

約数和(自身を除く): 17434778

約数列:

[1, 2, 5, 10, 971, 1942, 2237, 4474, 4855, 9710, 11185, 22370, 2172127, 4344254, 10860635, 21721270]

約数ペア:

[(1, 21721270), (2, 10860635), (5, 4344254), (10, 2172127), (971, 22370), (1942, 11185), (2237, 9710), (4474, 4855)]