21837291

素因数分解:

$3^1\times 7^2\times {\mathrm{149}}^1\times {\mathrm{997}}^1$

素因数の和:1163

約数の個数: 24

約数和(自身を含む): 34131600

約数和(自身を除く): 12294309

約数列:

[1, 3, 7, 21, 49, 147, 149, 447, 997, 1043, 2991, 3129, 6979, 7301, 20937, 21903, 48853, 146559, 148553, 445659, 1039871, 3119613, 7279097, 21837291]

約数ペア:

[(1, 21837291), (3, 7279097), (7, 3119613), (21, 1039871), (49, 445659), (147, 148553), (149, 146559), (447, 48853), (997, 21903), (1043, 20937), (2991, 7301), (3129, 6979)]