21679028

素因数分解:

$2^2\times 7^1\times {\mathrm{103}}^1\times {\mathrm{7517}}^1$

素因数の和:7631

約数の個数: 24

約数和(自身を含む): 43784832

約数和(自身を除く): 22105804

約数列:

[1, 2, 4, 7, 14, 28, 103, 206, 412, 721, 1442, 2884, 7517, 15034, 30068, 52619, 105238, 210476, 774251, 1548502, 3097004, 5419757, 10839514, 21679028]

約数ペア:

[(1, 21679028), (2, 10839514), (4, 5419757), (7, 3097004), (14, 1548502), (28, 774251), (103, 210476), (206, 105238), (412, 52619), (721, 30068), (1442, 15034), (2884, 7517)]