21004994

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{6997}}^1$

素因数の和:7097

約数の個数: 16

約数和(自身を含む): 33590400

約数和(自身を除く): 12585406

約数列:

[1, 2, 19, 38, 79, 158, 1501, 3002, 6997, 13994, 132943, 265886, 552763, 1105526, 10502497, 21004994]

約数ペア:

[(1, 21004994), (2, 10502497), (19, 1105526), (38, 552763), (79, 265886), (158, 132943), (1501, 13994), (3002, 6997)]