21031978

素因数分解:

$2^1\times {\mathrm{11}}^2\times {\mathrm{233}}^1\times {\mathrm{373}}^1$

素因数の和:630

約数の個数: 24

約数和(自身を含む): 34918884

約数和(自身を除く): 13886906

約数列:

[1, 2, 11, 22, 121, 233, 242, 373, 466, 746, 2563, 4103, 5126, 8206, 28193, 45133, 56386, 86909, 90266, 173818, 955999, 1911998, 10515989, 21031978]

約数ペア:

[(1, 21031978), (2, 10515989), (11, 1911998), (22, 955999), (121, 173818), (233, 90266), (242, 86909), (373, 56386), (466, 45133), (746, 28193), (2563, 8206), (4103, 5126)]