21107728

素因数分解:

$2^4\times {\mathrm{647}}^1\times {\mathrm{2039}}^1$

素因数の和:2694

約数の個数: 20

約数和(自身を含む): 40979520

約数和(自身を除く): 19871792

約数列:

[1, 2, 4, 8, 16, 647, 1294, 2039, 2588, 4078, 5176, 8156, 10352, 16312, 32624, 1319233, 2638466, 5276932, 10553864, 21107728]

約数ペア:

[(1, 21107728), (2, 10553864), (4, 5276932), (8, 2638466), (16, 1319233), (647, 32624), (1294, 16312), (2039, 10352), (2588, 8156), (4078, 5176)]