20726480

素因数分解:

$2^4\times 5^1\times {\mathrm{509}}^2$

素因数の和:1031

約数の個数: 30

約数和(自身を含む): 48283926

約数和(自身を除く): 27557446

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 509, 1018, 2036, 2545, 4072, 5090, 8144, 10180, 20360, 40720, 259081, 518162, 1036324, 1295405, 2072648, 2590810, 4145296, 5181620, 10363240, 20726480]

約数ペア:

[(1, 20726480), (2, 10363240), (4, 5181620), (5, 4145296), (8, 2590810), (10, 2072648), (16, 1295405), (20, 1036324), (40, 518162), (80, 259081), (509, 40720), (1018, 20360), (2036, 10180), (2545, 8144), (4072, 5090)]