21299728

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{42943}}^1$

素因数の和:42982

約数の個数: 20

約数和(自身を含む): 42600448

約数和(自身を除く): 21300720

約数列:

[1, 2, 4, 8, 16, 31, 62, 124, 248, 496, 42943, 85886, 171772, 343544, 687088, 1331233, 2662466, 5324932, 10649864, 21299728]

約数ペア:

[(1, 21299728), (2, 10649864), (4, 5324932), (8, 2662466), (16, 1331233), (31, 687088), (62, 343544), (124, 171772), (248, 85886), (496, 42943)]