20904988

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{193}}^1\times {\mathrm{2083}}^1$

素因数の和:2293

約数の個数: 24

約数和(自身を含む): 39621008

約数和(自身を除く): 18716020

約数列:

[1, 2, 4, 13, 26, 52, 193, 386, 772, 2083, 2509, 4166, 5018, 8332, 10036, 27079, 54158, 108316, 402019, 804038, 1608076, 5226247, 10452494, 20904988]

約数ペア:

[(1, 20904988), (2, 10452494), (4, 5226247), (13, 1608076), (26, 804038), (52, 402019), (193, 108316), (386, 54158), (772, 27079), (2083, 10036), (2509, 8332), (4166, 5018)]