21252148

素因数分解:

$2^2\times {\mathrm{43}}^1\times {\mathrm{157}}^1\times {\mathrm{787}}^1$

素因数の和:991

約数の個数: 24

約数和(自身を含む): 38347232

約数和(自身を除く): 17095084

約数列:

[1, 2, 4, 43, 86, 157, 172, 314, 628, 787, 1574, 3148, 6751, 13502, 27004, 33841, 67682, 123559, 135364, 247118, 494236, 5313037, 10626074, 21252148]

約数ペア:

[(1, 21252148), (2, 10626074), (4, 5313037), (43, 494236), (86, 247118), (157, 135364), (172, 123559), (314, 67682), (628, 33841), (787, 27004), (1574, 13502), (3148, 6751)]