21020825

素因数分解:

$5^2\times 7^1\times {\mathrm{113}}^1\times {\mathrm{1063}}^1$

素因数の和:1193

約数の個数: 24

約数和(自身を含む): 30081408

約数和(自身を除く): 9060583

約数列:

[1, 5, 7, 25, 35, 113, 175, 565, 791, 1063, 2825, 3955, 5315, 7441, 19775, 26575, 37205, 120119, 186025, 600595, 840833, 3002975, 4204165, 21020825]

約数ペア:

[(1, 21020825), (5, 4204165), (7, 3002975), (25, 840833), (35, 600595), (113, 186025), (175, 120119), (565, 37205), (791, 26575), (1063, 19775), (2825, 7441), (3955, 5315)]