20107720

素因数分解:

$2^3\times 5^1\times {\mathrm{547}}^1\times {\mathrm{919}}^1$

素因数の和:1477

約数の個数: 32

約数和(自身を含む): 45374400

約数和(自身を除く): 25266680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 547, 919, 1094, 1838, 2188, 2735, 3676, 4376, 4595, 5470, 7352, 9190, 10940, 18380, 21880, 36760, 502693, 1005386, 2010772, 2513465, 4021544, 5026930, 10053860, 20107720]

約数ペア:

[(1, 20107720), (2, 10053860), (4, 5026930), (5, 4021544), (8, 2513465), (10, 2010772), (20, 1005386), (40, 502693), (547, 36760), (919, 21880), (1094, 18380), (1838, 10940), (2188, 9190), (2735, 7352), (3676, 5470), (4376, 4595)]