21388810

素因数分解:

$2^1\times 5^1\times {\mathrm{1019}}^1\times {\mathrm{2099}}^1$

素因数の和:3125

約数の個数: 16

約数和(自身を含む): 38556000

約数和(自身を除く): 17167190

約数列:

[1, 2, 5, 10, 1019, 2038, 2099, 4198, 5095, 10190, 10495, 20990, 2138881, 4277762, 10694405, 21388810]

約数ペア:

[(1, 21388810), (2, 10694405), (5, 4277762), (10, 2138881), (1019, 20990), (2038, 10495), (2099, 10190), (4198, 5095)]