21256904

素因数分解:

$2^3\times {\mathrm{839}}^1\times {\mathrm{3167}}^1$

素因数の和:4012

約数の個数: 16

約数和(自身を含む): 39916800

約数和(自身を除く): 18659896

約数列:

[1, 2, 4, 8, 839, 1678, 3167, 3356, 6334, 6712, 12668, 25336, 2657113, 5314226, 10628452, 21256904]

約数ペア:

[(1, 21256904), (2, 10628452), (4, 5314226), (8, 2657113), (839, 25336), (1678, 12668), (3167, 6712), (3356, 6334)]