21138080

素因数分解:

$2^5\times 5^1\times {\mathrm{132113}}^1$

素因数の和:132128

約数の個数: 24

約数和(自身を含む): 49939092

約数和(自身を除く): 28801012

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 132113, 264226, 528452, 660565, 1056904, 1321130, 2113808, 2642260, 4227616, 5284520, 10569040, 21138080]

約数ペア:

[(1, 21138080), (2, 10569040), (4, 5284520), (5, 4227616), (8, 2642260), (10, 2113808), (16, 1321130), (20, 1056904), (32, 660565), (40, 528452), (80, 264226), (160, 132113)]