389855920

素因数分解:

$2^4\times 5^1\times {\mathrm{4873199}}^1$

素因数の和:4873212

約数の個数: 20

約数和(自身を含む): 906415200

約数和(自身を除く): 516559280

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 4873199, 9746398, 19492796, 24365995, 38985592, 48731990, 77971184, 97463980, 194927960, 389855920]

約数ペア:

[(1, 389855920), (2, 194927960), (4, 97463980), (5, 77971184), (8, 48731990), (10, 38985592), (16, 24365995), (20, 19492796), (40, 9746398), (80, 4873199)]