21031036

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{53}}^1\times {\mathrm{587}}^1$

素因数の和:670

約数の個数: 36

約数和(自身を含む): 40674312

約数和(自身を除く): 19643276

約数列:

[1, 2, 4, 13, 26, 52, 53, 106, 169, 212, 338, 587, 676, 689, 1174, 1378, 2348, 2756, 7631, 8957, 15262, 17914, 30524, 31111, 35828, 62222, 99203, 124444, 198406, 396812, 404443, 808886, 1617772, 5257759, 10515518, 21031036]

約数ペア:

[(1, 21031036), (2, 10515518), (4, 5257759), (13, 1617772), (26, 808886), (52, 404443), (53, 396812), (106, 198406), (169, 124444), (212, 99203), (338, 62222), (587, 35828), (676, 31111), (689, 30524), (1174, 17914), (1378, 15262), (2348, 8957), (2756, 7631)]