21000746468

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{1559}}^1\times {\mathrm{19927}}^1$

素因数の和:21516

約数の個数: 36

約数和(自身を含む): 39823318080

約数和(自身を除く): 18822571612

約数列:

[1, 2, 4, 13, 26, 52, 169, 338, 676, 1559, 3118, 6236, 19927, 20267, 39854, 40534, 79708, 81068, 259051, 263471, 518102, 526942, 1036204, 1053884, 3367663, 6735326, 13470652, 31066193, 62132386, 124264772, 403860509, 807721018, 1615442036, 5250186617, 10500373234, 21000746468]

約数ペア:

[(1, 21000746468), (2, 10500373234), (4, 5250186617), (13, 1615442036), (26, 807721018), (52, 403860509), (169, 124264772), (338, 62132386), (676, 31066193), (1559, 13470652), (3118, 6735326), (6236, 3367663), (19927, 1053884), (20267, 1036204), (39854, 526942), (40534, 518102), (79708, 263471), (81068, 259051)]