21811195

素因数分解:

$5^1\times 7^1\times {\mathrm{151}}^1\times {\mathrm{4127}}^1$

素因数の和:4290

約数の個数: 16

約数和(自身を含む): 30117888

約数和(自身を除く): 8306693

約数列:

[1, 5, 7, 35, 151, 755, 1057, 4127, 5285, 20635, 28889, 144445, 623177, 3115885, 4362239, 21811195]

約数ペア:

[(1, 21811195), (5, 4362239), (7, 3115885), (35, 623177), (151, 144445), (755, 28889), (1057, 20635), (4127, 5285)]