21640280

素因数分解:

$2^3\times 5^1\times {\mathrm{541007}}^1$

素因数の和:541018

約数の個数: 16

約数和(自身を含む): 48690720

約数和(自身を除く): 27050440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 541007, 1082014, 2164028, 2705035, 4328056, 5410070, 10820140, 21640280]

約数ペア:

[(1, 21640280), (2, 10820140), (4, 5410070), (5, 4328056), (8, 2705035), (10, 2164028), (20, 1082014), (40, 541007)]