21429220

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{15091}}^1$

素因数の和:15171

約数の個数: 24

約数和(自身を含む): 45638208

約数和(自身を除く): 24208988

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 15091, 30182, 60364, 75455, 150910, 301820, 1071461, 2142922, 4285844, 5357305, 10714610, 21429220]

約数ペア:

[(1, 21429220), (2, 10714610), (4, 5357305), (5, 4285844), (10, 2142922), (20, 1071461), (71, 301820), (142, 150910), (284, 75455), (355, 60364), (710, 30182), (1420, 15091)]