21139220

素因数分解:

$2^2\times 5^1\times {\mathrm{251}}^1\times {\mathrm{4211}}^1$

素因数の和:4471

約数の個数: 24

約数和(自身を含む): 44579808

約数和(自身を除く): 23440588

約数列:

[1, 2, 4, 5, 10, 20, 251, 502, 1004, 1255, 2510, 4211, 5020, 8422, 16844, 21055, 42110, 84220, 1056961, 2113922, 4227844, 5284805, 10569610, 21139220]

約数ペア:

[(1, 21139220), (2, 10569610), (4, 5284805), (5, 4227844), (10, 2113922), (20, 1056961), (251, 84220), (502, 42110), (1004, 21055), (1255, 16844), (2510, 8422), (4211, 5020)]