21821765

素因数分解:

$5^1\times 7^1\times {\mathrm{151}}^1\times {\mathrm{4129}}^1$

素因数の和:4292

約数の個数: 16

約数和(自身を含む): 30132480

約数和(自身を除く): 8310715

約数列:

[1, 5, 7, 35, 151, 755, 1057, 4129, 5285, 20645, 28903, 144515, 623479, 3117395, 4364353, 21821765]

約数ペア:

[(1, 21821765), (5, 4364353), (7, 3117395), (35, 623479), (151, 144515), (755, 28903), (1057, 20645), (4129, 5285)]