20407947

素因数分解:

$3^1\times 7^1\times {\mathrm{607}}^1\times {\mathrm{1601}}^1$

素因数の和:2218

約数の個数: 16

約数和(自身を含む): 31168512

約数和(自身を除く): 10760565

約数列:

[1, 3, 7, 21, 607, 1601, 1821, 4249, 4803, 11207, 12747, 33621, 971807, 2915421, 6802649, 20407947]

約数ペア:

[(1, 20407947), (3, 6802649), (7, 2915421), (21, 971807), (607, 33621), (1601, 12747), (1821, 11207), (4249, 4803)]