20999565

素因数分解:

$3^2\times 5^1\times {\mathrm{439}}^1\times {\mathrm{1063}}^1$

素因数の和:1513

約数の個数: 24

約数和(自身を含む): 36516480

約数和(自身を除く): 15516915

約数列:

[1, 3, 5, 9, 15, 45, 439, 1063, 1317, 2195, 3189, 3951, 5315, 6585, 9567, 15945, 19755, 47835, 466657, 1399971, 2333285, 4199913, 6999855, 20999565]

約数ペア:

[(1, 20999565), (3, 6999855), (5, 4199913), (9, 2333285), (15, 1399971), (45, 466657), (439, 47835), (1063, 19755), (1317, 15945), (2195, 9567), (3189, 6585), (3951, 5315)]