21027260

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{25643}}^1$

素因数の和:25693

約数の個数: 24

約数和(自身を含む): 45236016

約数和(自身を除く): 24208756

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 25643, 51286, 102572, 128215, 256430, 512860, 1051363, 2102726, 4205452, 5256815, 10513630, 21027260]

約数ペア:

[(1, 21027260), (2, 10513630), (4, 5256815), (5, 4205452), (10, 2102726), (20, 1051363), (41, 512860), (82, 256430), (164, 128215), (205, 102572), (410, 51286), (820, 25643)]