21278984

素因数分解:

$2^3\times {\mathrm{71}}^1\times {\mathrm{37463}}^1$

素因数の和:37540

約数の個数: 16

約数和(自身を含む): 40461120

約数和(自身を除く): 19182136

約数列:

[1, 2, 4, 8, 71, 142, 284, 568, 37463, 74926, 149852, 299704, 2659873, 5319746, 10639492, 21278984]

約数ペア:

[(1, 21278984), (2, 10639492), (4, 5319746), (8, 2659873), (71, 299704), (142, 149852), (284, 74926), (568, 37463)]