21086512

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{30649}}^1$

素因数の和:30700

約数の個数: 20

約数和(自身を含む): 41806600

約数和(自身を除く): 20720088

約数列:

[1, 2, 4, 8, 16, 43, 86, 172, 344, 688, 30649, 61298, 122596, 245192, 490384, 1317907, 2635814, 5271628, 10543256, 21086512]

約数ペア:

[(1, 21086512), (2, 10543256), (4, 5271628), (8, 2635814), (16, 1317907), (43, 490384), (86, 245192), (172, 122596), (344, 61298), (688, 30649)]