19517840

素因数分解:

$2^4\times 5^1\times {\mathrm{243973}}^1$

素因数の和:243986

約数の個数: 20

約数和(自身を含む): 45379164

約数和(自身を除く): 25861324

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 243973, 487946, 975892, 1219865, 1951784, 2439730, 3903568, 4879460, 9758920, 19517840]

約数ペア:

[(1, 19517840), (2, 9758920), (4, 4879460), (5, 3903568), (8, 2439730), (10, 1951784), (16, 1219865), (20, 975892), (40, 487946), (80, 243973)]