21000000572

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{276315797}}^1$

素因数の和:276315820

約数の個数: 12

約数和(自身を含む): 38684211720

約数和(自身を除く): 17684211148

約数列:

[1, 2, 4, 19, 38, 76, 276315797, 552631594, 1105263188, 5250000143, 10500000286, 21000000572]

約数ペア:

[(1, 21000000572), (2, 10500000286), (4, 5250000143), (19, 1105263188), (38, 552631594), (76, 276315797)]