21075313

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{211}}^1\times {\mathrm{751}}^1$

素因数の和:988

約数の個数: 16

約数和(自身を含む): 25507840

約数和(自身を除く): 4432527

約数列:

[1, 7, 19, 133, 211, 751, 1477, 4009, 5257, 14269, 28063, 99883, 158461, 1109227, 3010759, 21075313]

約数ペア:

[(1, 21075313), (7, 3010759), (19, 1109227), (133, 158461), (211, 99883), (751, 28063), (1477, 14269), (4009, 5257)]