21490580

素因数分解:

$2^2\times 5^1\times {\mathrm{313}}^1\times {\mathrm{3433}}^1$

素因数の和:3755

約数の個数: 24

約数和(自身を含む): 45287592

約数和(自身を除く): 23797012

約数列:

[1, 2, 4, 5, 10, 20, 313, 626, 1252, 1565, 3130, 3433, 6260, 6866, 13732, 17165, 34330, 68660, 1074529, 2149058, 4298116, 5372645, 10745290, 21490580]

約数ペア:

[(1, 21490580), (2, 10745290), (4, 5372645), (5, 4298116), (10, 2149058), (20, 1074529), (313, 68660), (626, 34330), (1252, 17165), (1565, 13732), (3130, 6866), (3433, 6260)]