20421908

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{607}}^1\times {\mathrm{647}}^1$

素因数の和:1271

約数の個数: 24

約数和(自身を含む): 38610432

約数和(自身を除く): 18188524

約数列:

[1, 2, 4, 13, 26, 52, 607, 647, 1214, 1294, 2428, 2588, 7891, 8411, 15782, 16822, 31564, 33644, 392729, 785458, 1570916, 5105477, 10210954, 20421908]

約数ペア:

[(1, 20421908), (2, 10210954), (4, 5105477), (13, 1570916), (26, 785458), (52, 392729), (607, 33644), (647, 31564), (1214, 16822), (1294, 15782), (2428, 8411), (2588, 7891)]