19493840

素因数分解:

$2^4\times 5^1\times {\mathrm{243673}}^1$

素因数の和:243686

約数の個数: 20

約数和(自身を含む): 45323364

約数和(自身を除く): 25829524

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 243673, 487346, 974692, 1218365, 1949384, 2436730, 3898768, 4873460, 9746920, 19493840]

約数ペア:

[(1, 19493840), (2, 9746920), (4, 4873460), (5, 3898768), (8, 2436730), (10, 1949384), (16, 1218365), (20, 974692), (40, 487346), (80, 243673)]