21251377

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{107}}^1\times {\mathrm{1669}}^1$

素因数の和:1800

約数の個数: 16

約数和(自身を含む): 25971840

約数和(自身を除く): 4720463

約数列:

[1, 7, 17, 107, 119, 749, 1669, 1819, 11683, 12733, 28373, 178583, 198611, 1250081, 3035911, 21251377]

約数ペア:

[(1, 21251377), (7, 3035911), (17, 1250081), (107, 198611), (119, 178583), (749, 28373), (1669, 12733), (1819, 11683)]