21427220

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{9829}}^1$

素因数の和:9947

約数の個数: 24

約数和(自身を含む): 45414600

約数和(自身を除く): 23987380

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 9829, 19658, 39316, 49145, 98290, 196580, 1071361, 2142722, 4285444, 5356805, 10713610, 21427220]

約数ペア:

[(1, 21427220), (2, 10713610), (4, 5356805), (5, 4285444), (10, 2142722), (20, 1071361), (109, 196580), (218, 98290), (436, 49145), (545, 39316), (1090, 19658), (2180, 9829)]