821736680

素因数分解:

$2^3\times 5^1\times {\mathrm{20543417}}^1$

素因数の和:20543428

約数の個数: 16

約数和(自身を含む): 1848907620

約数和(自身を除く): 1027170940

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 20543417, 41086834, 82173668, 102717085, 164347336, 205434170, 410868340, 821736680]

約数ペア:

[(1, 821736680), (2, 410868340), (4, 205434170), (5, 164347336), (8, 102717085), (10, 82173668), (20, 41086834), (40, 20543417)]