21797020

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{155693}}^1$

素因数の和:155709

約数の個数: 24

約数和(自身を含む): 52313184

約数和(自身を除く): 30516164

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 155693, 311386, 622772, 778465, 1089851, 1556930, 2179702, 3113860, 4359404, 5449255, 10898510, 21797020]

約数ペア:

[(1, 21797020), (2, 10898510), (4, 5449255), (5, 4359404), (7, 3113860), (10, 2179702), (14, 1556930), (20, 1089851), (28, 778465), (35, 622772), (70, 311386), (140, 155693)]